I went from stock to rooted, TWRP, S-off, CM 10.2. The first time I tried it, the phone immediately required activation. So I went back to a stock rooted ROM performed the activation and then went back to CM 10.2. I tested calling, Data, and text everything worked. 2 hours later I tried to place a call and the phone wanted to be activated again. Everything I've found referring to this issue says going back to stock and activating before flashing the ROM fixes this problem. Any ideas?