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 resolves 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
Make sure Airplane mode is turned off.
To Turn off Airplane Mode
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 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 center.
Search for a network from the device to check if any networks are available.
To search for available cellular networks
If your device is not receiving any network signal, or the signal is too weak, contact your network operator and make sure 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 resolves the issue.
DeactivateSTAMINA modeand restart your device. To save battery power,STAMINA modedisables mobile data when the screen is turned off.
To Deactivate STAMINA Mode
Make sure you have subscribed to use the Internet over a mobile network. Contact your network operator for detailed information.
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 a slower GSM (2G) network, not networks such as WCDMA (3G) or LTE (4G) 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
If none of the mentioned solutions resolved the issue, try these actions one after the other. Verify after the first action whether the problem was resolved before trying the next one.
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. Be sure to back up data you want to keep. For any other problems, you can contact caliber enterprises.
