Just wanted to share my picture of the broken 4G that I have.
So part of the flex cable is broken and the following things don't work anymore:
- LED indicator
- normal phone speaker.
I ordered a new display that comes with a cable from here, to solve the problem, because I could't find the flex cable itself and T-Mobile didn't want to invoke a warranty case(I am in germany, that's the main reason)
Thank you very much for you answer, I'm having probably the same problem with the relay (too much keyboard opening I suppose...)