Why is phone constantly giving me error messages?

If I'm trying to play ANY of my games it will give me a error ormessage. If I try to use anything on my phone it gives me error messages.

Makes it very difficult to use my phone sometimes. Sometimes it won't let me play or do anything on my phone. Constantly freezes screen not while I'm on the phone and I can't hear anyone and they can hear me and I have to take the battery put and see if my phone will let me use it. Very annoying