1. pickles1968's Avatar
    I have a lumia 900 locked to At&t. I put in an inactive sim from straight talk. The phone fails to bring up unlock screen to enter code. I have tried the numbers on dial pad also. Does the sim need to be active? Or, is there another way to reach the unlock screen? Please help. Thanks
    12-11-2013 07:19 AM
  2. Laura Knotek's Avatar
    Do you have an AT&T or T-Mobile SIM from Straight Talk? If it's an AT&T Straight Talk SIM, you won't need to unlock the device.
    12-11-2013 12:58 PM
  3. pickles1968's Avatar
    I had a straight talk card in it, but my wifi wouldnt work, also, couldnt text half my contacts. Odd. I have tried keypad entry #7728.. to no avail? I am wondering if there is another keypad entry to force unlock screen? Is an att locked phone, and had an active straight talk sim in it. any help would be greatly appreciated.
    12-13-2013 05:58 PM

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