Sony M5

[chrisoula]

My device suddenly is showing a colorful background and doing flashes, before that I have a post in my screen "your Ul is ended"  or something like that,  I have to restart in order to do my calls for more. Please tell me what to do. Thank you. 

[Martin1]

Hi @chrisoula, sorry to hear about this.

The error message saying that "System UI has stopped is usually generated by a downloaded app in the phone. Since it might be hard to detect which app in the phone that is generating the error message, the easiest way to get rid of the error message is to repair the software using a computer and Xperia Companion.

Keep in mind though that a software repair will erase all user data from the phone, so make sure to do a backup of your user data before the repair. 

I hope that helped!