Touch works but becomes erratic, can be fully restored by lock/unlkI have a 5s with an unusual problem. When the phone is booted or unlocked, touch works perfectly. As I use it, touch degrades...
Answer to: Battery drains quickly and behaves weirdly after replacementI'm in a similar situation, I bought a cheap replacement battery and have the same symptoms. My guess is that it isn't able to maintain sufficient voltage as the battery discharges or during a sudden spike in current draw. I'm just buying a new one and spending a bit more. Is yours a 1560mah one? Those appear to the cheapest ones, and I'm wondering if they all come the same place.