I have been trying to unlock my iPhone 6 Plus which is locked to TMobile. The instructions which they sent me read as follows:

Thank you for taking the time to contact T-Mobile. 24 hours after receiving this email, follow the below instructions for unlocking your T-Mobile iPhone. If you have a non-T-Mobile SIM card, follow these steps:

If you have a non-T-Mobile SIM card: 1. Insert non T-Mobile SIM Card 2. Complete the setup process.

If you will be using your T-Mobile SIM card follow the steps below:

  1. Back up your iPhone using iTunes.
  2. When you have a backup, erase your iPhone.
  3. When you see the Welcome screen, connect your device to iTunes.

If successfully unlocked, the message Congratulations, your iPhone has been unlocked will display. Additional information for unlocking Apple iPhone devices can be located at https://support.apple.com/en-us/HT201328

I performed all the operations, which have been a pain the neck in their own right. Now I have a fully erased and restored phone on my hands. What I am wondering about is how to actually check to make sure it worked. That is, I am planning to use it abroad and would like to avoid hiccups like arriving to a new place and discovering that for some reason this did not work.

Any help is appreciated.


Before your trip, find a friend whose cell phone connects with a carrier other than T-Mobile (and not an MVNO that connects via T-Mobile), and whose phone has a SIM card of the same size.

Put the friend's SIM card in your phone. If the phone connects, your phone has been unlocked.

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