My lovely new silver 5s came in today. I sat down to activate it and it won't accept my billing ZIP and last 4 of SSN as valid. Checked with both Apple and AT&T. Each claims I need to speak with the other. ATT has the IMEI and SIM number updated in their database, Apple says all is well on their end to. Apple CSR did say he had another one of these cases today but no solution yet. Any others having this issue?