To perform a factory data reset
To avoid permanent damage to your device, do not interrupt a factory data reset
procedure.
1.
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.
2.
Find and tap Settings > System > Backup & reset.
3.
Tap Factory data reset > Reset phone.
4.
If required, draw your screen unlock pattern or enter your screen unlock password or
PIN to continue.
5.
To confirm, tap Erase everything.
Your device does not revert to an earlier software version of Android when you
perform a factory data reset.
12
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There is no network coverage or mobile data connection
If there is no network coverage, try the following:
o
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.
o
Make sure Airplane mode is turned off.
o
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.
o
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.
o
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.
o
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.
o
Search for a network from the device to check if any networks are available.
If there is no mobile data connection, try the following: