1. sma_16's Avatar
    This may be a dumb question but I am curious if it would work. If AT&T has not yet released the Denim update for my 635 but I have unlocked the phone, can I insert a sim from another carrier (from another country) which has released it in order to update without waiting for AT&T? I do not know if anyone else has tried this or if I would need to flash a non carrier based rom in order to make this work.
    05-04-2015 09:15 PM
  2. xandros9's Avatar
    The phone's ROM dictates the source of updates.

    Sticking in another carrier's SIM will change nothing. Neither will changing the region setting.
    Guytronic and tpbklake like this.
    05-04-2015 09:18 PM
  3. sma_16's Avatar
    I don't suppose it is possible to change the rom is it?
    05-05-2015 12:32 AM
  4. walrusmonarch's Avatar
    I am pretty sure AT&T locks down their devices. I flashed from the prepaid AT&T rom to the postpaid AT&T rom. All other roms failed to flash.
    tpbklake and xandros9 like this.
    05-05-2015 01:12 AM
  5. sma_16's Avatar
    Where would I find a different rom to try this?
    05-05-2015 08:55 AM
  6. walrusmonarch's Avatar
    I followed this tutorial. I can't post links yet, but search for this thread on xda:

    [Tutorial] How to flash an Lumia device
    05-05-2015 09:51 AM

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