I have an unlocked/rooted XT926 and recently flashed CM12 nightly on it. I am unable to get 4G with a Selectel (Verizon) SIM in the phone, but 4G works fine with a Verizon SIM in the phone. Selectel rep is saying I "damaged" the SIM with a custom ROM and they won't replace the SIM. The Selectel SIM also doesn't connect 4G in any of 2 other XT926s nor in 2 XT912s, two of which have stock ROMs (though rooted). Is it possible for a custom ROM to damage or corrupt a SIM? I think it was bad out of the box, does this happen?