I bought a Sony Xperia 1 III second hand, and the SIM were detected but no signal, and not usable. The back glass was broken too, a bit. I used a playing card to cut the adhesive and removed the back glass, cutting off the cable to the camera and assistant, then I ordered a new flex with touch and upon replacing it, my SIM cards were working! It seems like that the flex cable has a blue antenna cable attached to it, and if the SIM cards do not work it is either because of the module is...Read more