Share your experience!
It could be a faulty SIM card or SD card, remove both SIM and SD cards and see if you experience the same issue
If you do, boot in >>> safe mode and see if you experience the same issue
if you do
repair the phone with XC and report back
Alternatives on How to backup Xperias
It could be a faulty SIM card or SD card, remove both SIM and SD cards and see if you experience the same issue
If you do, boot in >>> safe mode and see if you experience the same issue
if you do
repair the phone with XC and report back
Alternatives on How to backup Xperias