Here’s how: Unplug the power cord from the back of your device. If you have: An internal battery backup, remove it. DSL service, unplug your telephone cord from your modem or gateway. Wait 20 seconds. Put the internal battery back in, if applicable. Plug the power cord back in.Learn How to soft Reset on the AT&T Calypso. About AT&T Support:Find support videos for all the latest and greatest AT&T products, devices, & services.Connec...#resetnetworksettings #androidtips #androidtricks Learn how to reset network settings in Android mobile of Samsung, Micromax, Moto, Lenovo, Oppo, Vivo, Inte...Reset gateway Heads up: Be sure to jot down your custom settings, like your static IP address if you have one, or your Wi-Fi ® network name (SSID). You can then change them back after the factory reset. Press and hold the gateway Reset button for at least 10 seconds. If you let go before 10 seconds, the gateway will reboot, but it won’t reset.Mar 15, 2023 · Go to your myAT&T profile. Choose People & Permissions. Select Wireless. Scroll to Transfer phone number and select Request a new PIN. Your Number Transfer PIN will display on the screen. Heads up: AT&T employees can’t generate a Number Transfer PIN on your behalf. Nov 12, 2021 · Some carriers may assign special functions to certain codes that are exclusive to their network. Check the lists below for your carrier and see which features their USSD codes can unlock ... May 28, 2019 · The device unlock code that you received from AT&T is used to unlock your device from the AT&T network, so it is the same as the network unlock code. When you go to complete the unlock process and enter your unlock code in your device, please follow the instructions that you were provided via email along with your unlock code, and be sure to ... May 28, 2019 · The device unlock code that you received from AT&T is used to unlock your device from the AT&T network, so it is the same as the network unlock code. When you go to complete the unlock process and enter your unlock code in your device, please follow the instructions that you were provided via email along with your unlock code, and be sure to ... It’s usually located on the back or side of the house. Use a screwdriver to open the box. Look for a phone jack labeled customer access jack. Unplug the short telephone cord and plug in your corded phone. See if the problem still exists. If you: Don’t have a clear dial tone: The problem is with the AT&T network.How can we help you? Contact AT&T by phone or live chat to order new service, track orders, and get customer service, billing and tech support.Jun 12, 2023 · Talk to sales Call +1 (888) 610-2915 to find the best hosting for you. Dec 16, 2022 · Try these tips: Make sure your Ethernet cable is connected to the WAN port on your Cell Booster and your router or gateway. If you have a modem and a separate router, try connecting your Cell Booster directly to your modem. Check the internet connection on other devices. Restart your router or gateway and your Cell Booster device. Here’s how: Unplug the power cord from the back of your device. If you have: An internal battery backup, remove it. DSL service, unplug your telephone cord from your modem or gateway. Wait 20 seconds. Put the internal battery back in, if applicable. Plug the power cord back in.There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your deviceUsing the network reset utility in Windows 10 is fairly simple. Go to Start menu > Settings, then select Network and Internet . In the left navigation pane, select Status to make sure you're viewing the network status window. Then scroll down until you see the Network Reset link. Click the Network Reset link and review the Network Reset ...Manage and personalize your home Wi-Fi network with AT&T Smart Home Manager. With this free and secure tool, you can add or block connected devices, run speed tests, apply internet access controls and more. Jun 8, 2022 · General t mobile short codes. t mobile short codes. Preventing the network connection of a stolen phone, you may utilize the IMEI number provided by these t mobile short codes numbers. This number is unique to your T-Mobile phone: IMEI number *#06#. Battery status *#0228#. Nov 19, 2020 · Whether you're troubleshooting or setting up a new network, factory resetting your router or modem is sometimes necessary. AT&T U-Verse users can reset their devices to factory default, as well. Resetting your device will erase data like your WiFi name and password. Be sure you're ready to reset the device before proceeding. Apr 16, 2017 · I also recommend resetting network settings, as this refreshes the phone’s connection. This will not erase any personal media, but it will remove any saved Wi-Fi networks and passwords. To complete this, please go to Settings > General > Reset > Reset Network Settings. The phone will reboot, and you can re-enter your saved Wi-Fi details. Sep 6, 2023 · You can use the following codes to retrieve information about your system (hardware and software): *#06# - Display the IMEI. *#*#4636#*#* - Display information about your phone, its battery and additional usage statistics. *#232337# - Display the MAC address of your Bluetooth radio. *#232338# - Display the MAC address of your WLAN adapter. Tap "Reset Settings" to begin the process. Provide your lock screen PIN, password, fingerprint, or other form of authentication, then tap "Reset Settings" again to confirm. Once this is complete, your Android device's network settings will reset to default settings, and you should restart your device to complete the changes.General t mobile short codes. t mobile short codes. Preventing the network connection of a stolen phone, you may utilize the IMEI number provided by these t mobile short codes numbers. This number is unique to your T-Mobile phone: IMEI number *#06#. Battery status *#0228#.How to unlock a SIM with a PIN unlock key (PUK) Go to your account overview and open the My wireless section. Scroll to My devices & add-ons and choose the device that needs a PUK code. Select Manage my device. Under See device options, select Get your PIN unlock key (PUK).There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your device We can definitely provide you with some more information on this. Unfortunately, the incorrect entry of an unlock code too many times during the life of the device disables the unlock ability and permanently locks the device to the network. We do apologize for the inconvenience. Sean, AT&T Community Specialist. 0.Jan 20, 2023 · Use the AT&T Network Coverage Map. It's easy to check our network coverage in your location: Go to the AT&T Network Coverage Map. Enter an address, state, or ZIP Code, and select the search icon. We'll show you what type of coverage is available. In an area with limited or no coverage? #resetnetworksettings #androidtips #androidtricks Learn how to reset network settings in Android mobile of Samsung, Micromax, Moto, Lenovo, Oppo, Vivo, Inte...Mar 15, 2023 · Go to your myAT&T profile. Choose People & Permissions. Select Wireless. Scroll to Transfer phone number and select Request a new PIN. Your Number Transfer PIN will display on the screen. Heads up: AT&T employees can’t generate a Number Transfer PIN on your behalf. Reset network settings If you are having connectivity issues, you can try resetting your network settings. Swipe down from the Notification bar with two fingers, then select the Settings icon > scroll to and select System > Reset options > Reset Wi-Fi, mobile & Bluetooth > Reset settings > select Reset settings again to confirm.Aug 31, 2023 · Choose Apple menu > System Settings or System Preferences, then click Screen Time. Select a child's name from the pop-up menu. Click Change Passcode, then click Forgot Passcode. Enter the Apple ID and passwordthat you used to set up the Screen Time passcode. Forgot your Apple ID password? Enter a new Screen Time passcode, then enter it again to ... Feb 28, 2021 · Tap "Reset Settings" to begin the process. Provide your lock screen PIN, password, fingerprint, or other form of authentication, then tap "Reset Settings" again to confirm. Once this is complete, your Android device's network settings will reset to default settings, and you should restart your device to complete the changes. • We can only unlock devices that are locked to the AT&T network. • You can submit a new request if you lose your unlock code. There’s a limit to the number times you can try to enter the code to unlock your device. The specific number depends on your device model and manufacturer.Talk to sales Call +1 (888) 610-2915 to find the best hosting for you.Restart your gateway or modem manually. Unplug the power cord from the back of your gateway or modem. If you have: Wait 20 seconds. Put the internal battery back in if you have one. Plug the power cord back in. If you have DSL service, reconnect the phone cord. Wait for the gateway or modem to restart and your Broadband light to turn solid green.Press Win + I and click on Network & Internet. Go to the Proxy and VPN tabs and toggle off any active connections. Next, in the Wi-Fi section, click on Manage known networks. Select the Wi-Fi networks you’re having trouble with here and click on Forget. Press Win + R, type appwiz.cpl, and press Enter.Dec 7, 2022 · Enter a PIN code to lock your SIM card. The default PIN code for an AT&T SIM card is "1111". Change the default PIN code for more security. After activating SIM lock, you must enter the PIN code if you move the SIM card to another device. If you forget your SIM lock PIN code, learn how to get the PIN Unlock Key (PUK) code to unlock your SIM card. With your device powered off, press and hold down the Volume up and Power/Lock buttons at the same time until the screen lights up. 2. Press the Volume up button to scroll to Recovery Mode, then press the Volume down button to select. 3. From the "No command" screen, press and hold the Power/Lock and Volume up buttons for a few seconds then ... May 28, 2019 · The device unlock code that you received from AT&T is used to unlock your device from the AT&T network, so it is the same as the network unlock code. When you go to complete the unlock process and enter your unlock code in your device, please follow the instructions that you were provided via email along with your unlock code, and be sure to ... Wi-Fi name is labeled Wi-Fi Network Name. Wi-Fi password is labeled Wi-Fi Password. macOS® users may need to enter $ at the beginning of the password; Settings screen You can also get network info from a device connected to your home network. This is useful if your Wi-Fi info has changed. Just go to your gateway or hub settings. Smart Home ManagerMay 17, 2023 · Here’s how: Unplug the power cord from the back of your device. If you have: An internal battery backup, remove it. DSL service, unplug your telephone cord from your modem or gateway. Wait 20 seconds. Put the internal battery back in, if applicable. Plug the power cord back in. Then, follow these steps on your phone: 1. Connect to Wi-Fi®. 2. Open Settings and look for Network, Connections, Mobile, or similar. 3. Find the option to download a SIM or eSIM. 4. Follow the prompts to scan the QR code on your eSIM activation card from AT&T. Tap the Settings icon. Scroll to and tap Backup & reset. Tap Factory data reset. Tap Reset phone. Note: Tap to check Format SD card to remove all data on the MicroSD card. If security is enabled, enter your unlock PIN, password, or pattern code. Tap Erase everything. If unable to reset the device using the above steps, try this alternate master ...Oct 24, 2012 · The reset codes work file on my note 1, I cant seem to find a way to get a complete factory reset. When I use the phones factory reset it dosent erase anything really ... Motorola Gateways. Launch a browser window and navigate to IP address 192.168.1.254. Click Home Network. Click Subnets & DHCP. Enter the system password, if prompted. The device access code (system password) is a 10-digit code found on the label side of RG (the label on the 589 is black with white letters).Talk to sales Call +1 (888) 610-2915 to find the best hosting for you.Use Smart Home Manager from a computer to update your Wi-Fi ® info: Sign in to Smart Home Manager. Scroll to the My Wi-Fi card and choose Change next to the name or password. Select X to clear existing info, then enter a new name or password. Select Save. Reconnect your devices with the updated network info.Feb 28, 2021 · Tap "Reset Settings" to begin the process. Provide your lock screen PIN, password, fingerprint, or other form of authentication, then tap "Reset Settings" again to confirm. Once this is complete, your Android device's network settings will reset to default settings, and you should restart your device to complete the changes. Learn more about AT&T Wireless plans and AT&T Internet service, including AT&T Fiber. Shop cell phones, accessories and more. Network reset. I am not able to send texts on my pre paid flip phone and I pretty sure its something that I did I changed the settings on the text settings there was a phone number it had on message settings. Questions. 665. 0.Try to sign in to your email using your new password. If that doesn’t work, reset your password. Go to reset your password. Enter your user ID and the last name associated with your ID. Choose your verification method and follow the prompts. Enter and confirm your new password.Learn more about AT&T Wireless plans and AT&T Internet service, including AT&T Fiber. Shop cell phones, accessories and more. Use the AT&T Network Coverage Map. It's easy to check our network coverage in your location: Go to the AT&T Network Coverage Map. Enter an address, state, or ZIP Code, and select the search icon. We'll show you what type of coverage is available. In an area with limited or no coverage?If you change or reset your password, make sure: You update your password wherever you have it saved. This includes your devices, web browsers, and any apps. Use the same ID and password to sign in to both myAT&T and your email? Make sure you use the new password to sign in to your AT&T Mail account. Still having trouble with your password?There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your deviceLearn more about AT&T Wireless plans and AT&T Internet service, including AT&T Fiber. Shop cell phones, accessories and more.Sep 25, 2021 · Most often it's because the code isn't entered correctly....typo, upper/lower case error, mistaking a 0 for an O, etc. I usually suggest people take a picture of the label with their phone so they can zoom in and make certain of the characters. Next, try a different web browser. I've seen reports of certain browsers (I think it was a Mac) which ... And I HAVE TRIED EVERYTHING!!!! I entered the code in the back of the device, hit forgot code entered the number again, I have unplugged it, held down the reset button, unplugged it and plugged it back in WHILE holding down the reset button, logged in from chrome, Firefox, and safari. I even did a lil dance lol and nothing has worked!!!!!• We can only unlock devices that are locked to the AT&T network. • You can submit a new request if you lose your unlock code. There’s a limit to the number times you can try to enter the code to unlock your device. The specific number depends on your device model and manufacturer.Touch screen (TSP and Touch Key) firmware information code and update TSK and TSP firmware: *#2663#. Insert Network Lock Control Keycode: #7465625*638*#. Samsung Phone USB Settings Code: *#0808#. Reset total call time Code: *#22558463#. Here is the complete list of secret codes for the Samsung galaxy series.Steps for resetting Samsung phone using Android Factory Reset Code. Step 1. First of all, remove the SIM from your Samsung device. Step 2. Next, open the phone app/dialer on your Samsung phone and enter the code - *#*#7780#*#*. Step 3. The process of factory resetting will begin as soon as the code is entered.There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset Power cycle your deviceDec 16, 2022 · Try these tips: Make sure your Ethernet cable is connected to the WAN port on your Cell Booster and your router or gateway. If you have a modem and a separate router, try connecting your Cell Booster directly to your modem. Check the internet connection on other devices. Restart your router or gateway and your Cell Booster device. 3. *#*#7780#*#* – Perform a Factory Reset. If you want to reset your Android phone or tablet without going to device settings or using ADB commands, you can dial *#*#7780#*#*. The code will wipe all data, media files, call logs, messages, and third-party apps from your device and bring it to the same factory state it was when you purchased it.Learn more about AT&T Wireless plans and AT&T Internet service, including AT&T Fiber. Shop cell phones, accessories and more.Dec 16, 2022 · Try these tips: Make sure your Ethernet cable is connected to the WAN port on your Cell Booster and your router or gateway. If you have a modem and a separate router, try connecting your Cell Booster directly to your modem. Check the internet connection on other devices. Restart your router or gateway and your Cell Booster device. Conclusion Codes The following tables list the conclusion codes and conclusion code descriptions. ... BO-ID/Reset 109 AT&T Network 110 PTT Network 11 Emergency ... Samsung Galaxy Network Unlock Codes. If you see the "Enter Network Lock Control Key" or " SIM Network Unlock PIN" on the screen. If the message "Unsuccessful" appears, you have tried to enter the unlock code several times. In this case, enter: *2767*3855# to reset your Phone. Enter your Unfreeze code (MCK) into the SIM network to unlock the PIN ...Reset network settings If you are having connectivity issues, you can try resetting your network settings. Swipe down from the Notification bar with two fingers, then select the Settings icon > scroll to and select System > Reset options > Reset Wi-Fi, mobile & Bluetooth > Reset settings > select Reset settings again to confirm.There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your device There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your device Dec 7, 2022 · Call forwarding details. You can continue to make outgoing calls from your wireless phone. The designated number receives forwarded Incoming calls. Call forwarding overrides your wireless voicemail. If the designated forwarding number is busy, callers to your number will receive a busy signal. You can’t forward calls to an international number. With your device powered off, press and hold down the Volume up and Power/Lock buttons at the same time until the screen lights up. 2. Press the Volume up button to scroll to Recovery Mode, then press the Volume down button to select. 3. From the "No command" screen, press and hold the Power/Lock and Volume up buttons for a few seconds then ...Jul 11, 2023 · Using the network reset utility in Windows 10 is fairly simple. Go to Start menu > Settings, then select Network and Internet . In the left navigation pane, select Status to make sure you're viewing the network status window. Then scroll down until you see the Network Reset link. Click the Network Reset link and review the Network Reset ... Here’s how: Unplug the power cord from the back of your device. If you have: An internal battery backup, remove it. DSL service, unplug your telephone cord from your modem or gateway. Wait 20 seconds. Put the internal battery back in, if applicable. Plug the power cord back in.Apr 30, 2020 · Step 3: Input the code and your device is unlocked. If the device does not ask for the Samsung Codes, then follow the instructions below: Method 1. Step 1: Open the phone and type #7465625*638*# in the dialer. Step 2: Then, it will ask for the Samsung Reset Code, it is an 8-digit code. Step 3: Provide it and you will be done. Method 2 It’s usually located on the back or side of the house. Use a screwdriver to open the box. Look for a phone jack labeled customer access jack. Unplug the short telephone cord and plug in your corded phone. See if the problem still exists. If you: Don’t have a clear dial tone: The problem is with the AT&T network.Learn how you can help protect your phone from unauthorized use if it has been lost, stolen, or reset to factory settings without your permission. Secure My Device Learn how to lock or unlock your display, set a screen security lock type, get your PUK code, or request your device be unlocked from the AT&T network.Feb 28, 2021 · Tap "Reset Settings" to begin the process. Provide your lock screen PIN, password, fingerprint, or other form of authentication, then tap "Reset Settings" again to confirm. Once this is complete, your Android device's network settings will reset to default settings, and you should restart your device to complete the changes. Enter a PIN code to lock your SIM card. The default PIN code for an AT&T SIM card is "1111". Change the default PIN code for more security. After activating SIM lock, you must enter the PIN code if you move the SIM card to another device. If you forget your SIM lock PIN code, learn how to get the PIN Unlock Key (PUK) code to unlock your SIM card.There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your deviceWe can't find that ZIP Code. Try again. Enable your Wi-Fi network security - Pace 5031 ... Select Use custom Wireless Network Key. In the Key field, enter a new Wi-Fi ...Step 1 –. Go to Settings > Backup and Reset/General Management > Reset Network Settings > Reset. If prompted, enter your password and confirm the reset. Wait for the phone to complete the reset process. Step 2 –. First, go to Settings > Mobile Data and ensure that Mobile Data is enabled. (This will vary depending on your Android phone.Dec 7, 2022 · It’s usually located on the back or side of the house. Use a screwdriver to open the box. Look for a phone jack labeled customer access jack. Unplug the short telephone cord and plug in your corded phone. See if the problem still exists. If you: Don’t have a clear dial tone: The problem is with the AT&T network. Jul 31, 2018 · #resetnetworksettings #androidtips #androidtricks Learn how to reset network settings in Android mobile of Samsung, Micromax, Moto, Lenovo, Oppo, Vivo, Inte... Showing Content for | Change your ZIP Code. Enter another ZIP to see info from a different area. X | ` >. `. We can't find that ZIP Code. Try again.There are multiple ways to reset your device if you are experiencing issues. Power cycling your device is the first step. In this tutorial, you will learn how to: • Power cycle your device • Restart your device • Reset network settings • Perform a factory data reset • Perform an alternate master reset. Power cycle your deviceDec 16, 2022 · Try these tips: Make sure your Ethernet cable is connected to the WAN port on your Cell Booster and your router or gateway. If you have a modem and a separate router, try connecting your Cell Booster directly to your modem. Check the internet connection on other devices. Restart your router or gateway and your Cell Booster device. The password is a combination of letters, numbers, and/or symbols. Follow the prompts if you forgot your password. Your wireless passcode is different from your device passcode. You can call us at 800.331.0500 to get help for device unlock.Hello @rugr47. if you are trying to change your password for your wireless network, and you have to reset a password to get to this step, it is probably asking for the Device Access Code. This is a separate password that allows you to access the system. Look for the Device Access Code on the sticker, and try this one instead. Good Luck. Alex. 0.If things are looking good for the network, you can try simply restarting your device, resetting network settings to default, and a factory reset. If this all fails, you may have a malfunctioning ...Go to Home Network > Wireless. Either change the Network Name (SSID) or the Password. Changes can be made to your Wi-Fi name under Network Name (SSID) To change the password, change the Security from WPA-Default Key to WPA – PSK option then type your desired password in the Key section. Save all changes made to your device.
I've tried all the resets besides factory. Flicked mobile data on and off. Don't receive any MMS even on wifi. If you haven't already, turn on wifi calling. That doesn't fix the core problem, but you'll at least be able to send & receive. This worked on my Galaxy S20 Plus.. Pinochle free
Jun 23, 2020 · The MCK is the Master Code Key, and only Samsung has that for their devices. It resets the counter for the NCK input, the Network Unlock Code, which IS something AT&T has. It's likely that the Samsung reps you spoke to simply don't want to get evolved thinking it might be a stolen phone. Wi-Fi name is labeled Wi-Fi Network Name. Wi-Fi password is labeled Wi-Fi Password. macOS® users may need to enter $ at the beginning of the password; Settings screen You can also get network info from a device connected to your home network. This is useful if your Wi-Fi info has changed. Just go to your gateway or hub settings. Smart Home ManagerThen, follow these steps on your phone: 1. Connect to Wi-Fi®. 2. Open Settings and look for Network, Connections, Mobile, or similar. 3. Find the option to download a SIM or eSIM. 4. Follow the prompts to scan the QR code on your eSIM activation card from AT&T. Wi-Fi name is labeled Wi-Fi Network Name. Wi-Fi password is labeled Wi-Fi Password. macOS® users may need to enter $ at the beginning of the password; Settings screen You can also get network info from a device connected to your home network. This is useful if your Wi-Fi info has changed. Just go to your gateway or hub settings. Smart Home ManagerFrom the general screen, scroll down and select reset. You will be taken to the reset screen. Select Reset Network Settings. Resetting the network deletes saved Wi-Fi Networks. Note: For specific instructions on how to reset your device, visit our Device How-To.Select your device's brand or model > Your Device > Tutorials > Troubleshooting ...Nov 19, 2020 · Whether you're troubleshooting or setting up a new network, factory resetting your router or modem is sometimes necessary. AT&T U-Verse users can reset their devices to factory default, as well. Resetting your device will erase data like your WiFi name and password. Be sure you're ready to reset the device before proceeding. You're thinking of verizon wireless. *228 with them. With AT&T, it's enough to turn off your phone for a min, and turn it back on. Verizon uses older CDMA network, where extra nudging like that helps. Supposedly the GSM should auto update. The bottom line is, it doesn't exist. -Alex.Using the network reset utility in Windows 10 is fairly simple. Go to Start menu > Settings, then select Network and Internet . In the left navigation pane, select Status to make sure you're viewing the network status window. Then scroll down until you see the Network Reset link. Click the Network Reset link and review the Network Reset ...Jun 8, 2022 · General t mobile short codes. t mobile short codes. Preventing the network connection of a stolen phone, you may utilize the IMEI number provided by these t mobile short codes numbers. This number is unique to your T-Mobile phone: IMEI number *#06#. Battery status *#0228#. Aug 3, 2023 · Try to sign in to your email using your new password. If that doesn’t work, reset your password. Go to reset your password. Enter your user ID and the last name associated with your ID. Choose your verification method and follow the prompts. Enter and confirm your new password. #resetnetworksettings #androidtips #androidtricks Learn how to reset network settings in Android mobile of Samsung, Micromax, Moto, Lenovo, Oppo, Vivo, Inte...I will be happy to help! At this time, we do not have a code in order to update your tower. You can power cycle your phone (turn off and back on) or put your phone in airplane mode for a moment and back out to reset the network settings. If you have an iPhone, you can reset the network settings through Settings > General > Reset > Reset network ...Enter a PIN code to lock your SIM card. The default PIN code for an AT&T SIM card is "1111". Change the default PIN code for more security. After activating SIM lock, you must enter the PIN code if you move the SIM card to another device. If you forget your SIM lock PIN code, learn how to get the PIN Unlock Key (PUK) code to unlock your SIM card.Dec 7, 2022 · It’s usually located on the back or side of the house. Use a screwdriver to open the box. Look for a phone jack labeled customer access jack. Unplug the short telephone cord and plug in your corded phone. See if the problem still exists. If you: Don’t have a clear dial tone: The problem is with the AT&T network. Dec 7, 2022 · How to unlock a SIM with a PIN unlock key (PUK) Go to your account overview and open the My wireless section. Scroll to My devices & add-ons and choose the device that needs a PUK code. Select Manage my device. Under See device options, select Get your PIN unlock key (PUK). .