Most of you probably already know this but we had a customer bring in the mailer they got from GotW3. They were having issues getting the system to accept their OLD sim number. Immediately I saw the problem. While they mention putting the F at the end of the NEW sim card number, the directions that come before, which tells you what to do with the OLD sim card doesn't say a word about an F. The phone has been ringing off the hook with confused customers. So ONCE AGAIN, these folks have clogged my business with THEIR mistakes.