https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559021#M110977 <P>Ringtone is unknown and it happens every time. I will try to start in safe mode an see what happens.</P><P>/ Totta48</P> Fri, 11 Aug 2017 17:05:46 GMT myownmusic 2017-08-11T17:05:46Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559019#M110975 <P>My phone are switching ringtones to unknown ringtone when phone is turned off.</P><P>What's up?</P> Fri, 11 Aug 2017 09:43:36 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559019#M110975 myownmusic 2017-08-11T09:43:36Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559020#M110976 <P>Hi <A href="https://community.sony.co.uk/t5/user/viewprofilepage/user-id/1056985">@Totta48</A>,</P><P>I'm sorry to hear this.</P><P>Does this&nbsp;happen every time you restart your device? What is the name of the ringtone it changes to, is it always the same?</P><P>I recommend that you reboot your device to <A href="https://community.sony.co.uk/t5/c-sonymobile/safe+mode/pd-p/safe_mode" class="lia-product-mention" data-product="187-1">safe mode</A> to see if this behavior is caused by one of your downloaded apps as these will be temporarily disabled in this mode.&nbsp;</P><P>Let me know how it goes.</P> Fri, 11 Aug 2017 11:13:29 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559020#M110976 Emil 2017-08-11T11:13:29Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559021#M110977 <P>Ringtone is unknown and it happens every time. I will try to start in safe mode an see what happens.</P><P>/ Totta48</P> Fri, 11 Aug 2017 17:05:46 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559021#M110977 myownmusic 2017-08-11T17:05:46Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559022#M110978 <P>Still happening. What's next?</P> Fri, 11 Aug 2017 17:53:51 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559022#M110978 myownmusic 2017-08-11T17:53:51Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559023#M110979 <P>If you are still experiencing the same behavior I recommend that you perform a <A href="https://community.sony.co.uk/t5/c-sonymobile/software+repair+using+Xperia+Companion/pd-p/software_repair_2" class="lia-product-mention" data-product="190-1">software repair using Xperia Companion</A>.</P><P>Keep me posted on how it goes.</P> Wed, 16 Aug 2017 14:46:27 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559023#M110979 Emil 2017-08-16T14:46:27Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559024#M110980 <P>Ok.</P><P>I will try that.</P><P>/ Tomas&nbsp;</P> Sat, 19 Aug 2017 09:50:58 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559024#M110980 myownmusic 2017-08-19T09:50:58Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559025#M110981 <P>I have repaird the software but it did not help but i noted that the unknown ringtone is named 511.</P><P>/ Tomas&nbsp;</P> Sun, 20 Aug 2017 17:08:46 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559025#M110981 myownmusic 2017-08-20T17:08:46Z https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559026#M110982 <P>If you are using a SD card with your device I recommend that you&nbsp;temporarily remove it from your device to see if this is causing this behavior.</P><P>If there is no change can you try to reset your device again then start it without restoring any backup or adding a Google account to the device.</P><P>Keep me posted how it goes.</P> Mon, 21 Aug 2017 14:13:36 GMT https://community.sony.rs/t5/z-series/phone-change-ringtone-by-itself/m-p/3559026#M110982 Emil 2017-08-21T14:13:36Z