Why is my phone doing what it wants?

[AC Question]

Just recently, I'll be trying to do simple things (reply to a text, clear background apps, etc.) but instead, my phone will do what it wants (go to home screen, back to app, open google.) I tried seeing if restarting it would help, but after I clicked the 'Restart' key, it turned off and then wouldn't turned back on? It took about 5 minutes to turn back on after I held the power button down long enough. Please help!

 

[dpham00]

I would try a factory data reset