Ответ на "Whispernet Simcard change"rab77hp: Destroy the motherboard? I don't see that in this teardown you posted. Your teardown link is to a CDMA device. There is no SIM to extract. Yes, there is an empty spot that looks like a SIM socket can be added, but it is irrelevant because the CDMA radio won't have any use for it. You would need to be able to somehow put another radio on the board, and that is if the traces are even connected from the SIM socket location to the radio location anyway.