The problem is that it needs to arrive at their door by 10/12/11. If it doesn't, the offer I was given for $357 will be revoked. Obviously I'm doing this to buy 4S, but I won't get that until next week at the earliest. How do I get by without a phone for a week? Is there some sort of temp phone I can use for a while? I'm on AT&T's network. As long as I can still make calls, I should be good. My parents said they have an old Sony Ericsson phone from AT&T (back when it was Cingular). Can I use that? How do I switch my number over?