Do you know if you need to swap the SIM card on your old phone with the new one? Or can you take the old SIM and toss it for the new one that comes with the 5s? I would have thought this would be obvious, but since the iPhone 5 was the first time I've ever used a SIM card for LTE access, I wasn't sure. I know it was swapped over when I had to get my 5 replaced under warranty, but it was never clear to me whether this was actually mandatory or just a matter of convenience.
BTW I'm under a tiered data plan, so there's no worries about losing unlimited data.
BTW I'm under a tiered data plan, so there's no worries about losing unlimited data.