I spoke to T Mobile last night on the phone and the rep told me that I can use my Sprint iPhone 5, that is out of contract with Sprint, on T Mobile with no problems at all. I asked her about the need to unlock the phone and she reassured me several time that the phone is already unlocked and that I can use with no restrictions. I would get full LTE support and that it was a myth that the Sprint iPhone 5 is locked.
I was surprised that this was the case and thought before I jump ship and leave my unlimited sprint plan I would double check on these forums. I've been told in the past that my Sprint iPhone 5 will work on the HSPA 21 and lower networks only and that I would not get any LTE or HSPA 42.
Can a T Mobile rep confirm this for me? I asked the rep on the phone multiple times if she was sure about the information she provided to me and she even checked with a supervisor and they came back and told me that I would not have any problems on Pre-Paid or Post-Paid plans.
So what is the official T Mobile response to this?
Best answer by mansinha
I can only give you my experience -
What you were told is inaccurate
Sprint iPhone 5 may not work on T-Mobile at all even if unlocked
"Not all Sprint devices have an MSL code or a locking function that can be unlocked by Sprint (e.g., Apple devices cannot be unlocked to accept another domestic carrier's SIM card). On certain devices, not all functionality may be unlocked (e.g., for some smartphone devices, Sprint may be able to unlock the CDMA/voice functionality of the device but unable to unlock the GSM/UMTS/LTE portion of the device). Even if unlocked, Sprint devices will not necessarily work on another carrier's network."
They make special mention that Sprint's Apple devices will not work on another network. That is on Sprint's website itself. That is a copy and paste directly from their website - I have not altered it in any way
You are more than welcome to try:
1. Ask Sprint for the unlock code
2. Back up your iPhone and restore through iTunes - see if you get "Your device is unlocked" message
3. Then walk into a T-Mobile store and ask for a Nano SIM to trial into your iPhone 5
If you can make a call and / or they can call you on the number attached to that SIM - you are good to go - if it stops you at "Cannot recognize foreign SIM" as it did me - then you are stuck
Remember even with the Sprint "SIM" out you can still make and receive calls on your regular number since the CDMA technology is not dependent on the SIM being in there for calling.
What Sprint iPhone 5 IS unlocked for is for use OUTSIDE the US like while traveling etc.
Good luck and let us know what happens or if you have questions.
(by the way if you search Sprint Forums there is ONE report of a person that supposedly unlocked their iPhone 5 to use on T-Mobile - but the vast majority will tell you it simply cannot be done)