https://community.sony.ie/t5/m-series/user/m-p/3399752#M8432 I have Xperia m4 aqua, the vibration sometimes doesn't work then it work after while again I tried to fix it with sony pc companion but nothing changed Mon, 05 Oct 2015 19:03:31 GMT Med16696 2015-10-05T19:03:31Z https://community.sony.ie/t5/m-series/user/m-p/3399752#M8432 I have Xperia m4 aqua, the vibration sometimes doesn't work then it work after while again I tried to fix it with sony pc companion but nothing changed Mon, 05 Oct 2015 19:03:31 GMT https://community.sony.ie/t5/m-series/user/m-p/3399752#M8432 Med16696 2015-10-05T19:03:31Z https://community.sony.ie/t5/m-series/user/m-p/3399753#M8433 <P>Hi @Med16696</P><P><SPAN>Please, also verify if you have this issue when you boot your device into safe mode as explained </SPAN><A href="https://community.sony.co.uk/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008" target="_blank">here</A><SPAN>. If the issue is&nbsp;not present in this mode, that indicates a third party app is causing the problem. In this case exit Safe Mode and then un-install any third party apps you don't need and clear the cache/data for the apps you want to keep.</SPAN></P> Mon, 05 Oct 2015 19:10:29 GMT https://community.sony.ie/t5/m-series/user/m-p/3399753#M8433 xavinux 2015-10-05T19:10:29Z