1. SleepyTheDon's Avatar
    I'd like to risk it & flash my 900 to 7.8 how do i do it?
    12-16-2012 07:17 PM
  2. akar33's Avatar
    Do you have the RM808 or RM823?
    12-16-2012 07:26 PM
  3. anshrvohra's Avatar
    I'd like to update too, if AT&T doesn't release ir by christmas. I have a factory unlocked AT&T Lumia 900. RM 808, I'm guessing.
    12-17-2012 02:48 AM
  4. SleepyTheDon's Avatar
    This is what im running

    12-19-2012 09:18 AM
  5. BSOD's Avatar
    Nokia has not posted a ROM for the AT&T US version of Lumia 900 (RM-808) yet.
    the newest is 8779 which is Windows Phone 7.5.

    The 7.8 ROMs that have been posted are for the (RM-823) version of the Lumia 900
    As far as I know you cannot flash between the two especially since the RM-808 is LTE and the RM-823 is not.

    12-19-2012 12:53 PM
  6. SleepyTheDon's Avatar
    I dont care about the LTE because im using T-Mobile and im getting their "4G" in my area which is great since I was stuck on EDGE for months
    12-20-2012 06:39 AM
  7. akar33's Avatar
    Its not about whether you need LTE or not. You will not be able to flash the RM-808 with the RM-823 ROM. The bootloader doesn't allow this kind of cross-flashing.
    12-23-2012 08:54 AM
  8. crystal_planet's Avatar
    The 800 is the same way. RM 801 can do it, but the RM 819 can't. I think the rule applies to the North American devices.
    12-23-2012 07:02 PM
  9. Lumis90's Avatar
    It's easy, full internet of tutorials. Just flash the right version, flashing takes about 5mins at least on my Lumia 800
    12-27-2012 11:22 AM
  10. Max411's Avatar
    Unofficial windows 7.8 (xxxx.xxxx.8858.xxxx) is basically only compatible with rm-823. The rm-808 is basically for AT&T excluded with LTE 700 MHz band. In NaviFirm has xxxx.xxxx.8779.xxxx for rm-808 which is the latest version of 7.5 so we are all in US basically stuck with 7.5 for awhile
    12-28-2012 07:38 PM
  11. moonboy509's Avatar
    any news about nokia 900 window 7.8 ?
    01-10-2013 05:25 PM
  12. vormison's Avatar
    any news about nokia 900 window 7.8 ?
    Yup! It's coming by April.
    01-10-2013 06:52 PM
  13. moonboy509's Avatar
    oh damn, I thought It come this January... and that what I heard...
    01-12-2013 04:23 AM
  14. gcdc_lumia's Avatar
    nokia has confirmed to release 7.8 update within january.

    april my ***...
    01-12-2013 04:29 AM
  15. lvdovicvs's Avatar
    I have the RM823... Is there any link where i can get the 7.8 update for my device?
    01-13-2013 01:02 PM
  16. purefire's Avatar
    Hey guys does this also limit an unlocked rogers phone from being updated?
    01-20-2013 12:23 PM
  17. adSenthil's Avatar
    Hi im using Lumia 900 RM808 AT&T unlocked phone.Im not able to change the network mode to 2G/3G.It always takes only 4G>.s there any possible to to do software change to modify it.
    Email me to dpsendil@live.com
    01-31-2013 10:01 AM
  18. Rockyfancino's Avatar
    Its not about whether you need LTE or not. You will not be able to flash the RM-808 with the RM-823 ROM. The bootloader doesn't allow this kind of cross-flashing.
    07-31-2013 11:41 PM
  19. darkest.white's Avatar
    Download seveneighter from windows phone hacker, that's how I did it with my unlocked Samsung focus, now happily moved on to Lumia 920 though. Amazing.
    07-31-2013 11:51 PM

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