Unlocked phone no phone service Stockton CA

911 works shows unknown tower as location

google maps cannot locate my phone (blank map)

We understand the importance of having a properly working device, @CaTech209! Here are a couple of steps that may help to resolve your experience.

First, make sure that the exact model of your phone is one of these supported devices. Please note that the model numbers marked with an asterisk will need to have their software updated in order to continue making and receiving calls.

To update your software version, follow these steps which are found at our Device Support Center:

1. Make sure your device is fully charged and connected to Wi-Fi.
2. From the device home screen, swipe down from the Notification bar and tap Settings.
3. Scroll to and tap Software update, then Check for updates.
4. Follow the on-screen prompts to download and install the update. The device automatically restarts once the new software successfully installs.

Besides software updates, some customers have reported that the steps below have helped resolve their experience:

• Updating the SIM card. (To upgrade your SIM, visit your nearest AT&T Store.)
• Updating the APN settings following these instructions:
• 1. Tap your Settings menu.
  2. Choose either Wireless & Networks, More Networks, or Connections.
  3. Tap Mobile Networks, then Access Point Names.
  4. Find and select the option to add a new APN. You may find a plus (+) symbol on the screen, or tap the menu button.
  5. Program each field using the settings found in the table.
  6. Save your changes to return to the APN's menu and choose the new APN.

If these solutions do not work, you may need to upgrade to an HD Voice capable device, upgrade your SIM, or both.

Also, please be advised that devices not sold by AT&T may not be compatible with all services. Even if AT&T sells the same make/model, a device sold by another carrier or by the device manufacturer may function differently.

We hope this info helps. Thank you for contacting AT&T Community Forums.

Darais, AT&T Community Specialist