The new phone will come with a SIM card so you just need to activate it and restore your iPhone 5 backup. The old SIM card would then be useless.I ordered a gray 6S. It still says that it should arrive on the 25th.
I've never ordered an iPhone before, I've always bought them in the store. What do I do when the phone arrives? I hope I can set it up myself, I would hate to have to take it to a crowded ATT store.
I currently have an iPhone 5. I assume I switch the SIM card to the 6S. Then let iTunes restore the phone from the iCloud backup I have of my iPhone 5. Is that correct? Or is there anything else?