Replacement Power Amplifier (PA) IC chip compatible with iPhone 4 and 4S (CompatibleAD 2 models)
Part number: 77541-32
Function – Amplifies cellular signals for better call quality and network reception
Repair use – Ideal for phones with weak signal, no network reception, or frequent call drops
Designed for precise installation on the motherboard by a qualified technician
Ensures stable and reliable network performance after replacement