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    There is no network coverage or mobile data connection

    • If there is no network coverage, try the following:
      • Turn off your device and then turn it back on. By doing this you turn off all running applications and free up memory, which sometimes automatically solves the issue.
      • Make sure you have set your device to use the network type that your SIM card supports. Contact your network operator if you don't know which network types are supported.

        To select a network mode

        1. From your Home screen, tap .
        2. Find and tap Settings > More… > Mobile networks .
        3. Select a SIM card.
        4. Tap Network Mode , then select a network mode.
      • Make sure Airplane mode is turned off.

        To turn off Airplane mode

        1. From your Home screen, tap .
        2. Find and tap Settings > More… .
        3. Unmark the Airplane mode checkbox.
      • Check the signal strength icon in the status bar to make sure that your device is connected to a network. If the signal is low or there is no signal, move to an open location, or get close to a window.
      • Make sure that your SIM card is working properly. Insert your SIM card in another device. If this works, it is probably your device that is causing the problem. In this case, contact the nearest Sony Mobile service centre.
      • Search for a network from the device to check if any networks are available.

        To search for available mobile networks

        1. From your Home screen, tap .
        2. Find and tap Settings > More… > Mobile networks .
        3. Select a SIM card.
        4. Tap Service providers .
        5. Select a network in the list that appears.
      • If your device is not receiving any network signal, or the signal is too weak, contact your network operator and make sure that the network has coverage where you are.
    • If there is no mobile data connection, try the following:
      • Turn off your device and then turn it back on. By doing this you turn off all running applications and free up memory, which sometimes automatically solves the issue.
      • Make sure you have subscribed to use the Internet over a mobile network. Contact your network operator for detailed information.
      • Check if STAMINA mode is activated. When activated, STAMINA mode pauses mobile data and Wi-Fi® connections when the screen is off. If this is causing the connection problem, try excluding some applications and services from being paused, or deactivate STAMINA mode temporarily.

        To select which applications to run in STAMINA mode

        1. From your Home screen, tap .
        2. Find and tap Settings > Power management , then tap STAMINA mode .
        3. Activate STAMINA mode if it is deactivated.
        4. Make sure that the Extended standby checkbox is marked, then tap Apps active in standby > Add applications .
        5. Scroll left or right to view all applications and services, then mark the relevant checkboxes for the applications that you want to run.
        6. When you're finished, tap Done .
        1. From your Home screen, tap .
        2. Find and tap Settings > Power management .
        3. Drag the slider beside STAMINA mode to the left.
      • Move to another area and try again. In areas with poor reception where there may be issues with your network provider's base station, you may lose your mobile data connection and therefore need to move to a different area.
      • When you use your device while moving, you may lose your mobile data connection due to issues with your network provider’s network.
      • Sometimes your device only connects to slower GSM (2G) networks and not to networks such as WCDMA (3G) with higher speeds. This is because your device automatically switches between mobile networks depending on which mobile networks are available in different areas. You can manually set your device to use a particular mobile network mode. When changing network mode, it can sometimes take several minutes until your device reconnects to a network.

        To select a network mode

        1. From your Home screen, tap .
        2. Find and tap Settings > More… > Mobile networks .
        3. Select a SIM card.
        4. Tap Network Mode , then select a network mode.
    • If none of the mentioned solutions solved the issue, try these actions one after the other. Verify after the first action whether the problem was solved before trying the next one.
      • Update your device to ensure that you have optimal performance and the latest enhancements. Read more about how to update and find latest software version.
      • Perform a factory data reset. This is sometimes the best solution if your device stops functioning properly, but note that it will delete all personal content saved on the internal memory of your device. Make sure to back up data that you want to keep.

        To back up your data using a computer

        1. Make sure that Xperia™ Companion for Windows or Mac OS is installed on your PC or Mac®.
        2. Connect your device to the computer using a USB cable.
        3. Computer: Open the Xperia™ Companion software. After a few moments, the computer detects your device.
        4. Select Backup on the main screen.
        5. Follow the on-screen instructions to back up data from your device.

        To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.

        1. Before you start, make sure to back up any important data that is saved on the internal memory of your device to a memory card or other non-internal memory.
        2. From your Home screen, tap .
        3. Find and tap Settings > Backup & reset > Factory data reset .
        4. To delete information, such as pictures and music, from your internal storage, mark the Erase internal storage checkbox.
        5. Tap Reset phone .
        6. If required, draw your screen unlock pattern, or enter your screen unlock password or PIN to continue.
        7. To confirm, tap Erase everything .

        Your device does not revert to an earlier software version of Android™ when you perform a factory data reset.

        If you forget your screen unlock password, PIN or pattern, you can use the device repair feature in Xperia™ Companion to erase the security layer. You need to provide your Google account login details to perform this operation. By running the repair feature, you reinstall software for your device and you may lose some personal data in the process.

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