Hello,
I have a 5s that is in perfect condition, but it has some problems.
1: Compass doesn't work, just shows nothing in compass app.
2: Gyroscope doesn't work, again just shows 0 degrees and the "perspective" background doesn't move.
3: Touch only works when your finger is touching the chassis, if it is on a table and you are not touching it it does not recognize any touch. If you touch the chassis and use it it will work fine. Probibly just caused by a crappy $17 Chinese screen.
My top problems are the compass and gyroscope. How would I fix it? Could it be an antenna?