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Does the iPhone 5 require a factory reset to switch from GSM to CDMA

Before I ordered my iPhone 5 from StraightTalk I explained that I wanted to use it as a CDMA (Verizon) in the US and as a GSM (Vodafone) in Europe.

I specifically asked if the phone would become a CDMA phone again when I removed the Vodafone GSM Sim after returning to the US. The answer was Yes.


The CDMA function worked well in the US and the GSM function worked equally well in Europe.

However, when I did remove the GSM card, the iPhone 5 stopped working.


According to StraightTalk, the only way to return to the CDMA function is to have them do a factory reset, which means loosing all data and downloaded apps.

Of course, nobody told me that when I asked the question.

Does anybody know if this is a requirement for every iPhone 5 or just for StraightTalk phones?

iPhone 5, iOS 6.1.4, StraightTalk iPhone 5

Posted on Jun 16, 2013 9:03 AM

Reply
108 replies

Jul 28, 2013 1:46 PM in response to deggie

deggie wrote:


Meg, do you know if this extends to Straight Talk purchased iPhones which are really MVNO Verizon phones?

No, sorry, I really don't know. I know that StraightTalk has used both unlocked ATT phones and Verizon iPhone 5s. Apparently, they use the VZW iPhone 5s without the LTE SIM somehow, which I didn't think was possible. Completely confused. I guess it's within the realm of possibility, though, that they are not bound by the same agreement and relock the GSM part of the phone.


Edit: Oops. Didn't see your last post on the matter!

Jul 28, 2013 1:54 PM in response to deggie

deggie wrote:


With further research I discovered they current Straight Talk iPhone 5 is the same one sold by Cricket. They are using Tracfones MVNO network and you cannot put the Verizon nanoSIM in either but they aren't really locked.

Still can't figure out how they work without a SIM. You can't use the CDMA part of the iPhone 5 on Verizon without the LTE SiM in place. The phone just won't activate. I have obviously run up against the limits of my technical knowledge.

Jul 28, 2013 2:19 PM in response to deggie

deggie wrote:


Don't Cricket and Straight Talk both use SIMS? Apparently designed for those phones on the Verizon network with a different carrier settings file.

I seem to recall another thread I got embroiled in where someone posted a link to the Straightalk website specifically saying the iPhone didn't use a SIM. It only works on 3G. Sorry, I can't seem to find the thread or the page that it referenced. Nor would I bother with either of them. But then, I still (for one last contract) have the Verizon unlimited data plan.

Jul 28, 2013 2:24 PM in response to IdrisSeabright

The StraightTalk iPhone 5 I purchased from Walmart uses the Verizon network for CDMA (no Sim). In Europe I use it as a GSM phone (it's unlocked) with a Vodafone Sim card. Works fine. In order to turn it back to CDMA you have to do a factory reset. You loose all your data but if you backup your phone before the resset, restoring the data is a piece of cake.

Jul 28, 2013 2:28 PM in response to HazelhoffHenk

HazelhoffHenk wrote:


The StraightTalk iPhone 5 I purchased from Walmart uses the Verizon network for CDMA (no Sim).

Thanks for the confirmation. That's what I've been told. I still don't understand it, though. You simply can't use a Verizon iPhone 5 (or any other 4G phone) on Verizon's network without a 4G LTE SIM. Obviously, something has been changed in the set up of the phone. I just don't know what. Nor do I expect you to! 🙂

Jul 28, 2013 2:58 PM in response to TJBUSMC1973

No offense to you but this post here is arguing and I don't see plenty of other posts that out of the blue go off on a tangent that has nothing to do with the topic at hand or anything to do with technical support with Apple.


It may be part of human nature to you but it is a violation of the ToU here.


I take no offense because you are incorrect. And I'm far from the only person here who has made the same comment about you. So you are saying everyone else here is incorrect...except you. You are also in the wrong place if you just want to participate in 'discussion' and conversation. Reread the Terms of Use.


I'd suggest that the ASC is not a good fit for you and you might want to try a different site.

Does the iPhone 5 require a factory reset to switch from GSM to CDMA

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