Can I use my sprint iPhone 4S with another carrier if it's unlocked

Sorry, but even with an unlocked Sprint phone, you cannot go with another carrier because Sprint uses CDMA technology, and AT&T and T-Mobile use GSM. They are not compatible.

Sorry,

GB

Talk to Sprint....

GB

iPhone 4s has the proper bands for GSM. But its some sort of deal they have with Apple I pressume. There are ways to unlock it when you have it on iOS 6 there is a chip that goes between your sim and tricks phone so it can work but then you wont get picture messaging or possibly no data depending on what carrier you go to next.

If you want an true unlocked phone I would recommend buying another phone.

Because Sprint is a CDMA carrier and the other carriers that you wish to use are GSM carriers. The CDMA carriers - Verizon and Sprint have always been this way and because they use CDMA technology, you do not need to insert a sim card into your phone, unless you are travelling.

That is just the way it is and if you want to leave Sprint as your carrier and go to a GSM carrier, then unfortunately you will not be able to use a CDMA phone - that is just how it works, so if you want to do anything different, then you will have to go and buy a new GSM unlocked phone so that you can use it with T-Mobile or whatever other GSM carrier you wish to.

Nothing else for it - you'll have to get a new phone.

What you were told is not correct. Only the carrier an iPhone was sold as carrier locked with can officially unlock the iPhone or send the unlock request to Apple on the owner's behalf. A combo CDMA/GSM iPhone activated with Sprint can be unlocked for to use a GSM carrier's SIM card outside of the U.S. only.

You cannot unlock the phone for domestic use. Your Sprint phone has a sim card slot that can only be used internationally when travelling to pick up GSM signals and that is it. Don't know why they mentioned T-Mobile? If you have a Sprint CDMA phone, then T-Mobile have nothing to do with any kind of unlocking.

If you have a Sprint phone, then you can only ever use it with Sprint in the US and that is it. If you want to use another network such as Verizon, then you'll have to go to either Apple or Verizon and buy a new phone for use on the CDMA Verizon network.

Also, if you wish to switch to another GSM network in the US, such as AT&T or T-Moible, then you'll have to buy a new unlocked iPhone that you can use.

You can only use a Sprint phone in the US with Sprint - nothing else, but you can use the sim slot internationally whilst travelling for GSM use.

Bottom Line: If you want to use any other network in the US, CDMA or GSM, then you are looking at buying a new phone.

Sorry, what others here have said is wrong, wrong, wrong. There is nothing about the hardware of the iPhone 4S that would prevent a Sprint 4S from being used on T-Mobile, or any GSM carrier, international or domestic. Nothing. Zero. Zip. Zilch. Nada. Each and every 4S is 100% hardware capable of doing both GSM and CDMA out of the box. The only impediment is that Sprint would have to authorize an unlock for you. This is something they simply refuse to do. If anyone at Sprint has told you that they can't unlock a 4S for domestic use with another carrier, they have lied to your face. This, by the way, is something they're doing with everyone who asks the question - just Google search "Sprint unlock iPhone 4S", and you'll see dozens of internet threads where people talk about being lied to by Sprint about this issue. The good news is that Sprint signed an agreement with the FCC regarding letting off-contract customers unlock their phones. The agreement takes effect in mid-March, and Sprint is dragging its feet until then. Once that deadline passes, if Sprint still hasn't agreed to unlock your phone, then they're in violation of the agreement, and you can and should report them to the FCC. I sure plan to. Then I'm going to switch carriers, to one that doesn't lie to me and keep fraudulent liens on my property.

What a wonderful, emotional rant.

It is wrong but you sure got into it.

Sorry, but no, it isn't. Again, the 4S is completely hardware capable of doing both GSM and CDMA, which means it's totally usable on both AT&T and T-Mobile. If Sprint says that it can't unlock it for use with domestic GSM carriers, that's just an outright lie (unless by "can't" they simply mean "won't"). If they can unlock it for use with international GSM carriers, they could unlock it for use with domestic carriers. they simply refuse to.

I repeat: the 4S is 100% hardware capable of doing both GSM and CDMA. There is zero hardware difference between a 4S you get from AT&T, Verizon, or Sprint. There was for the 4, but not the 4S.

Could you please provide a link to the part where domestic carriers are going to unlock phones for domestic carrier use? I would like to read through that myself. I would especially like to read about the ability to activate a CDMA phone on another carrier.

Which carrier the phone can use can be set via firmware. While you are are correct that the hardware could work Sprint chooses not to allow it. But the people posting that the Sprint 4s can't be unlocked for domestic use are right and so it Sprint.

I know, domestic carriers have always prevented devices from being used on other domestic carriers, and Sprint and Verizon do not allow devices not from their network originally from being used on the other. They would not activate them. I just wanted to see what ruling he was referring to.

Sorry Chris, hit the wrong reply button. But he is referring to this: http://blog.ctia.org/2013/12/12/ctia-announces-voluntary-principles-unlocking-wi reless-devices/