1. itsjoe67's Avatar
    I've been trying to flash my AT&T (locked) Nokia Lumia 920 for DAYS now. I've read some of the more popular and more easy to read detailed steps (since i'm kinda new to this) but i know i have been seeing the error code for the invalid FFU signature and this is before flashing the default AT&T ROM to Rogers (rm-820) dev ROM. Is there something i'm missing here? i have looked and double checked EVERYTHING from the coding of all the documents within the folder where the ROM is held to making sure the correct fw is in the right location. screenshot-1-.png

    If someone could please help i would appreciate the help.
    08-19-2013 12:58 PM
  2. gazmatic's Avatar

    turn off your device
    then press and hold power button and volume down until it vibrates
    after it vibrates hold the volume up button
    you are now in flashing mode. you will see a cog and a lightning bolt

    make sure you have the proper firmware


    follow the steps in that thread....

    make sure that your phone is in flashing mode and plugged in
    08-19-2013 03:16 PM
  3. A J Benamu's Avatar
    Make sure you are working offline.. File - Work Offline
    08-19-2013 10:43 PM

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