Why does my S5 back button keep going on?

[sweetaction]

S5 back button keeps going on

My back button keeps flashing on its own and either takes me to my task manager or takes my phone to the screen where I can move my apps and change my wallpaper. What can I do??

 

[B. Diddy]

Re: S5 back button keeps going on

Welcome to Android Central! It might be a hardware issue--not sure if a software bug would do that. You could try wiping the cache partition, which doesn't erase any personal data: http://support.t-mobile.com/docs/DOC-10404. If that doesn't work, try Safe Mode, just in case it is due to a 3rd party app (steps are at the bottom of that link). Last resort would be a factory reset. If none of that works, then bring it to a repair shop, or contact Samsung if still under warranty.