I just inserted one in for the first time in my S7. This is a AT&T 3G SIM card I got from Amazon this week (because I was down with the flu and did not want to drive to a local store). The S7 reports no card. I tried re-seating it. Nothing. Later tried a SIM card from another phone; no go. It does not "see" them. Other than applying the ...C60B011 ROM weeks ago, I have changed nothing else (no rooting yet.) Any ideas would be appreciated.