So I know this is a long shot, and I probably will need to just chuck it at a wall and buy a new phone, but this phone is very laggy (unusable, takes minutes to even type, and apps never load) and it overheats very badly. I measured the battery temperature at 130 degrees Fahrenheit just at its home screen with no apps or services running. I know replacement batteries are inexpensive, but I am beginning to think that it is the processor. No point in replacing anything if the processor is shot.
What does the ifixit community think I should do?