iPhone 5c has no imei number, no liquid damage
I have an iPhone 5c that requires repair.
At first it had a signal problem, I checked the network and settings and found it has no imei, I've encountered this before and in my experience found that a clean in the ultrasonic and then a reflow or clean works.
In this case it has no signs of liquid damage but I gave it an ultrasonic clean anyways,,
-resetting network settings
-gave it a chemical clean
-tried another battery
Is there anything else I can try? Any chips or ICs I should be looking at and checking?