Is it possible to have a Verizon iPhone 4s work with AT&T?

My friend wants to get a new phone since hers broke, and since our friend is selling his she decided to buy it off of him. However, the phone is a Verizon iPhone 4s and she's under AT&T.

Can the carrier unlock the phone for her to use? Or can AT&T Unlock the phone for her? I know that T-Mobile was doing something similar with iPhones before they became usable for T-mobile so I was wondering if AT&T was doing the same thing. We don't want to jailbreak the phone in case something happens to it and we need to get it fixed by Apple.

The 4S has a sim card slot so get it unlocked by anyone who unlocks online.

No, the CDMA phone will not work on the GSM network.

The only thing I could think of is jailbreaking it.

Try checking with Verizon if they can unlock the phone because I doubt ATT will unlock it since it is originally from Verizon. If Verizon won't unlock it, then you need to get a service to have it unlock for you. After the iPhone Factory Unlock, you will be able to use it to different carriers, also on ATT.

  • Will any Verizon SIM card work in an Verizon iPhone 4S? I had recently acquired an iPhone 4S from an old friend. I was wondering if I could buy a cheap Verizon phone with a pay as you go plan, and remove the SIM from the cheap phone, cut it down to a Micro-SIM, and place it in my new iPhone.
  • Will a Verizon 4g lte sim work in a cdma verizon iphone 4s? I want to buy a iphone 4s online and my carrier is Verizon. If I bought a cdma Verizon one, and put my 4g lte sim into it, will I have my number and all that stuff and will it work?
  • Verizon Droid sim work in a Verizon Iphone 4s? Okay. So I understand that the Ipone 4s takes a Micro-sim. So my question is, If I cut my regular sim for my droid phone from verizon to a Micro Sim to put in my Verizon Iphone 4s will it work? Please answer if you have done this before. My boss gave me the droid and its an older one, It has about a 3in screen with a keyboard but it is a smart phone. I'm on unlimited minutes and texts and 6g of data. My phone is called a Droid Pro
  • My iPhone 5s carrier is Verizon but my Verizon SIM Card won't work? I bought an SIM Card off of Amazon but it still doesn't work? It says it's invalid and that it's not the right carrier. I bought it off Craigslist but I have all the info, even the date that the phone was purchased.