Keeps freezing and opening random apps

Question

So, I got my iphone 5 around February, and now it keeps freezing and opening random apps. Or when I am on the keyboard, it types random things.I have tried "Reset all Settings" and "Erase all Content and settings" without backing up with cloud and NOTHING is working. HELP!!!!!!!!!!!!

Answer 1

So, after reading all responses, I must say first of all thank you for keeping this active. It might help more people since I am not the only one with this issue.
What have I done so far? I used the soft reset quite often since it freezes often and the only way to get something out of it is the soft reset. It then takes a little while to reset ( more than once it seems) where the white light with black apple shows up and goes black again, then the home screen, flashes a few times, goes white again..... Black.... Home screen. I noticed that if I just let it do what it does, eventually it will get back to normal..... Until next time. I have emptied the ram, deleted pictures and apps to free space and keep my email accounts low. After all of that I noticed that it still reboots by its own ( suddenly white light w/ apple) and it gets warm on the back ( must be using lots of energy) at least once every day. Even when I think, ok 1 day w/out frozen screen, the light comes on suddenly at night while charging. I also noticed that it even happend once to my iPad ( 2) after updating to 8.3 so I still think it has to do with the recent update to iPhones 5 or older. Dont know if some one has had any problems like that with iPhone 6 or plus.
just wanted to follow up from my end and I think I will just hold on to the next update that hopefully solves the issue. If more ppl have that same problem it might happen soon. So, please keep posting and make the community aware of this so a fix will come soon.. !