You're right I was mistaken as I didn't realize reachability worked after you had already hit the bottom right tab square to display the x.
I did keep my 4S and planned on using it until a JB came out but I didnt realize that the phone came preloaded w my number that once activated could not be switched back without an adapter that apparently no store carries so I have to order it online.
lol, the sim card size has changed to be smaller since you got the 4S
The sim card adapters are super cheap online, bought a set from eBay for $2 shipped last year that has all the sizes and was send from inside the US so you get it pretty fast. If not I think you can find some in the accessories carts for phones in the mall, but would probably be more expensive.