1. mrpapid22's Avatar
    i have at&t nokia lumia 900, i try to unlock it, but at the end it display "sim card is missing or invalid.", then "no service-emergency call only." the sim card is new with a current phone number. Pls i need help with this phone.:
    06-25-2014 09:38 AM
  2. MDK22's Avatar
    Soooo, did you unlock the phone ?
    It'll display a graphic w an unlocked padlock. dial ##7820# to check (works on my Lumia 1520 - ##782# for other devices) ...

    and, what carrier's sim card are you using ?
    06-25-2014 10:36 AM

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