https://community.sony.cz/t5/1-series/xperia-1-keeps-saying-ui-has-stopped/m-p/3651087#M5100 <P>My Xperia 1 keeps freezing and occasionally says 'UI has stopped.' I have tried a factory reset and also deleting the majority of the apps with no improvement. This is incredibly frustrating, and for such an expensive handset is really putting me off Sony! I'm very close to actually getting my old phone out of a drawer to use instead!</P> Tue, 05 Nov 2019 20:48:32 GMT Razorbroon 2019-11-05T20:48:32Z https://community.sony.cz/t5/1-series/xperia-1-keeps-saying-ui-has-stopped/m-p/3651087#M5100 <P>My Xperia 1 keeps freezing and occasionally says 'UI has stopped.' I have tried a factory reset and also deleting the majority of the apps with no improvement. This is incredibly frustrating, and for such an expensive handset is really putting me off Sony! I'm very close to actually getting my old phone out of a drawer to use instead!</P> Tue, 05 Nov 2019 20:48:32 GMT https://community.sony.cz/t5/1-series/xperia-1-keeps-saying-ui-has-stopped/m-p/3651087#M5100 Razorbroon 2019-11-05T20:48:32Z https://community.sony.cz/t5/1-series/xperia-1-keeps-saying-ui-has-stopped/m-p/3651088#M5101 <P>Hi&nbsp;<A href="https://community.sony.co.uk/t5/user/viewprofilepage/user-id/1266057">@Razorbroon</A>, sorry to hear about this.&nbsp;</P><P>The error message "System UI has stopped" is nine out of ten times caused by a downloaded app in the phone, but since the error message did not disappear after a factory reset, I think that it would be best to try a <A href="https://community.sony.co.uk/t5/FAQ/How-to-perform-a-software-repair-with-Xperia-Companion/m-p/1103057" target="_self">software repair using Xperia Companion</A> and a computer. Keep in mind though that a software repair will erase all user data from the phone, so if it is advised to have your personal data <A href="https://support.sonymobile.com/global-en/xperia1/userguide/backing-up-and-restoring-content/" target="_self" rel="nofollow noopener noreferrer">backed up to your Google account</A>.</P><P>Let me know if that helped!&nbsp;</P> Wed, 06 Nov 2019 09:26:40 GMT https://community.sony.cz/t5/1-series/xperia-1-keeps-saying-ui-has-stopped/m-p/3651088#M5101 Martin1 2019-11-06T09:26:40Z