Why does my phone automatically starts up?

[AC Question]

why does my phone automatically starts up?

I have a galaxy S4 I9500,sometimes when i power off the phone it automatically starts up i have removed the battery and after putting it on it starts up again, couple of hours ago it started popping up the dock connected mode even it was not getting charged i tried to switch it off and luckily it switched off and it started charging too these problems occur oftenly and sometimes it works perfectly as usual can anybody assist me why?

 

[B. Diddy]

Re: why does my phone automatically starts up?

Welcome to Android Central! There might be an issue with the microUSB port. Check to see if there is any debris in there. Otherwise, it might be worth bringing the phone to a repair shop for them to take a look. Another possible problem could be the Power button, but that shouldn't cause the phone to go into Dock Mode.