can i use an old alltel iphone 5s

[rcox302]

My family just got converted from Alltel to AT&T, so they got new phones.  Can I use an old Alltel iPhone 5s on my verizon account, to upgrade from my 4s?

[Loquat]

I think I've heard that the phone has to be born on the VZW network in order for it to work...

[Snn5]

A lot will come down to the bands it uses.  Alltel was CDMA as well, but while it might work mostly, it won't work completely.  When Vzw and AT&T divided up my state's Alltel service 6 years ago, I had to get a Vzw phone to be fully compatible.

[nicholasbranson · Accepted solution]

There were 3 different models of iphone 5 made. Here is an excerpt from an apple support page:

Model number on the back cover:

• A1428: iPhone 5 (GSM model)
• A1429: iPhone 5 (GSM and CDMA model)
• A1442: iPhone 5 (CDMA model, China)

OK, so you need a phone that will work on a CDMA network. So either the A1429 or the A1442.

Identifying iPhone models - Apple Support