I don't know what your query is, but let me tell you more than what you have asked.
If there is software problem(Bug), then a Master Reset or a Firmware update may fix your phone, if its a hardware fault, then you can take it to the service centre.
Warn you that, this will delete all your Personal Files, installed applications and Settings.
Back up your phone using the PC suit.
To Master Reset:
1) On your phone, Go to Control Panel -> Other -> Master Reset.
(The default code is 0000, but if you have chaged it, Enter that one)
To Update the Firmware
1) Download SEUS (Sony Ericsson Update Servise) from Sonyericsson website
2) Run it and Follow the instructions, update the Firmware even if it says you allready have the latest firmware.
If I was helpful, kindly do Rate!
on Dec 14, 2020