Shuts down, no signal and battery problems only with sim card inserted
I have 3 iPhones with the same symptom. Battery goes down quickly, shuts down or no signal ONLY when you insert de SIM card. I've tested all these 3 iPhones with no SIM card, and they don't shut down, no baterry drain. I've tested with several SIMs cards that work perfectly in other devices (I mean other iPhones)
Is this a good question?