switched to T-mobile. ATT iphone 4 unlocked doesn't show "my number"

Discussion in 'iPhone Tips, Help and Troubleshooting' started by kazakh, Apr 17, 2013.

  1. kazakh macrumors member

    Jan 19, 2009
    Well, i just switched from ATT to T-mobile and am using my ATT iphone 4 which was unlocked thru ATT. Every time I try to open messages, it says the following: "MMS messaging requires your phone number. Press 'Settings" to go to the phone settings and enter your phone number'". When I do so and try to enter my phone number, it says that the phone number cannot be saved.

    Tried taking out/putting back in the sim card, connecting it to itunes, resetting networks settings - nothing works.

    Any idea what that could be? I assume that's a more or less common problem given how many questions show up on Google - but nobody seems to have a legit answer.

  2. kazakh thread starter macrumors member

    Jan 19, 2009
  3. kazakh thread starter macrumors member

    Jan 19, 2009
    i have. didn't work.

    I just went to a T-mobile store and asked them to give me a new sim card, which fixed the problem. So i assume the problem was in the sim card itself, which is weird because i have a second line with t-mobile and the sim card there is doing the same thing

Share This Page