An older thread asking about this just floated back up in the forums recently. I'd replied in that thread you could move an old SIM card to a newer phone and it ought to work. (That customer was a flip phone user, so maybe it's OK with flip phones, which don't have the sophistication smartphones do.) However, another…
How do I get this sucker past step 1?
Does this method keep the Fios tv guide and caller id stuff