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    The sound during calls is bad

    If you experience that the sound quality is bad during calls, try these actions one after the other. Verify after trying each action whether the problem was solved before trying the next one.

    • Check the network signal strength in the status bar to make sure your device is connected to a network. If the signal is weak or you have no signal, move to an open location that is free from obstructions, or get close to a window.

    • If your Xperia™ device uses a cover or a case, remove it to see if the sound quality improves.

    • Make sure that your hand isn’t covering the phone microphone, and check that there is no water or dust blocking the microphone or the area around the microphone.

    • 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 a call to another phone to confirm that there isn’t a problem with the ear speaker of the phone you were calling when the problem arose. If possible, make a call with a different SIM card, to make sure that your current SIM card isn’t defective or old.

    If the suggested solutions do not work, try the following actions:

    • Carry out a quick test to verify that the microphone and ear speaker are working properly.

      To carry out a test

      1. Find and tap Settings > Support .
      2. Select the Tests tab, then select a test from the list.
      3. Follow the instructions to carry out the test, then tap the check mark icon or the notification icon depending on whether you passed the test or not.

    • Use safe mode to check if any downloaded applications are causing the problem. In safe mode, your device only starts with software and applications that were already installed when you purchased your device. If the device’s performance improves in safe mode, it’s likely that one or more of your post-purchase downloaded applications are affecting the device negatively. You can exit safe mode and restart the device to uninstall the application or applications that you suspect are causing the problem. If the problem is recent and you're not sure which application is causing the problem, you can start by uninstalling the most recently downloaded application.

      To enable safe mode

      1. Turn off your device.
      2. Press and hold down the power key until the device vibrates.
      3. When the Sony logotype appears, press and hold the Volume down key until Safe mode appears on the screen.

      To exit safe mode, restart the device.

      To uninstall an application from the Application screen

      1. Touch and hold any area on the Application screen until the device vibrates. All applications that can be uninstalled are then indicated by .
      2. Select the application that you want to uninstall, then tap Delete .

      Some apps indicated by can only be disabled and not uninstalled. Disabling an app deletes all data, but the app can be enabled again from Settings > Apps .

    • 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 perform a factory data reset

      1. Make a backup of any important data stored on the internal memory to avoid permanent loss during the reset process.
      2. From your Home screen , tap .
      3. Find and tap Settings > Backup & reset > Factory data reset .
      4. Tap Reset phone .
      5. If required, draw your screen unlock pattern or enter your screen unlock password or PIN to continue.
      6. To confirm, tap Erase everything .

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

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

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    On your Xperia™ device, go to Settings > About phone/tablet > Model number
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    On your Xperia™ device, go to Settings > About phone/tablet > Model number