- Restart your smartphone and turn Wi-Fi OFF and ON again
- Remove any protective case from your device to see if it improves Wi-Fi signal strength.
- Restart the router. Check that your router is Wi-Fi certified. Your smartphone is Wi-Fi certified, so if the router isn’t, the devices may not communicate properly.
To check if your router is Wi-Fi certified
Look for the Wi-Fi CERTIFIED logo or phrase on the product packaging or in the product literature, or search the Wi-Fi CERTIFIED products database on the Wi-Fi Alliance website.
- Verify that you are in the range of the Wi-Fi router. Check the Wi-Fi signal strength (Wi-Fi icon) in the status bar. If the signal is low, or there is no signal, move closer to the router or Wi-Fi hotspot.
- Make sure that both your device and the router are using the latest software versions. You can use Xperia Companion or the Support app on your phone to check this. As for your router, visit the website of your router manufacturer for instructions on how to update the router software.
- Make sure that potentially interfering devices or appliances are not placed close to the Wi-Fi router. Cordless phones, microwave ovens, baby monitors, wireless speakers, monitors and video transmitters that operate in the 2.4 GHz or 5 GHz bandwidth may interfere with a Wi-Fi network. If the problem persists, try changing the router frequency band settings to 5 GHz or 2.4 GHz. For instructions on how to change router channel settings, check the user guide of the router or contact your router manufacturer.
- Change the Wi-Fi network security of your router to a different security encryption. For instructions on how to change the network security, check the user guide of the router or contact your router manufacturer.
- 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
- Unlock the screen of your device and connect your device to the computer using a USB cable.
- On the computer, select which files to back up, then copy and paste or drag and drop the files to a location on your PC.
To back up and synchronize apps, phone settings, and call history
Find and tap Settings > System > Advanced > Backup .
Tap the switch to enable the function. Your app data, device settings, and call history will be backed up automatically.
You can also enable backup from the settings menu in Google Drive. You can synchronize your app data, device settings, and call history automatically by logging in to the Google account used to synchronize data on your old device. When you power on your new device for the first time, log in to the Google account during the setup wizard.
To perform a factory data reset
To avoid permanent damage to your device, do not interrupt a factory data reset procedure.
- Back up any important data that is saved on the internal memory of your device to a memory card or other non-internal memory. If you have any encrypted files stored on an SD card, you should also remove the encryption to ensure you can still access them after the reset.
- Find and tap Settings > System > Advanced > Reset options .
- Tap Erase all data (factory reset) > Reset phone .
- If required, draw your screen unlock pattern or enter your screen unlock password or PIN to continue.
- To confirm, tap Erase everything.
Good to know: your device does not revert to an earlier software version of Android when you perform a factory data reset.