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  1. SPIFF Costa's Avatar
    No, you don't go back to GDR1 if you do hard reset and if you do hard reset your registry is as factory default.
    For me works fine GDR2 with 2424.15.3.2 firmware
    So you are saying there is no risk in changing the registry, right?
    05-19-2015 10:38 AM
  2. Dan Preda's Avatar
    So you are saying there is no risk in changing the registry, right?
    change of registry is only temporary, until to first hard reset
    is pretty safe but I can't tell is no risk, I don't know what is happens if you change wrong registry, another registry than are specified in guide or with a different value than specified in guide
    05-19-2015 10:48 AM
  3. SPIFF Costa's Avatar
    change of registry is only temporary, until to first hard reset
    is pretty safe but I can't tell is no risk, I don't know what is happens if you change wrong registry, another registry than are specified in guide or with a different value than specified in guide
    Yeah, I'm saying if you follow the guide. Ok, I'll give a shot. Thanks
    05-19-2015 10:56 AM
  4. romo11's Avatar
    gahbmwm: I have Ativ S, of course. Last FW ...15.3.2 and 8.1....341 WP (ATO). With PfD and Insider apps. It offered me directly W10.
    05-19-2015 11:05 AM
  5. Dan Preda's Avatar
    gahbmwm: I have Ativ S, of course. Last FW ...15.3.2 and 8.1....341 WP (ATO). With PfD and Insider apps. It offered me directly W10.
    you need to hard reset your phone before follow the guide
    I was on PfD and insider and after hard reset I follow the guide and get 8.1.2 version 8.10.15137.148
    05-19-2015 11:12 AM
  6. romo11's Avatar
    So only to be sure, I have to downgrade to 8.0 CMJ1 ATO. After pass through all upgrades. When finished I have to run Insider app and receive 8.1.2, after do hard reset to prevent upgrade to 10. OK?
    05-19-2015 12:18 PM
  7. Dan Preda's Avatar
    So only to be sure, I have to downgrade to 8.0 CMJ1 ATO. After pass through all upgrades. When finished I have to run Insider app and receive 8.1.2, after do hard reset to prevent upgrade to 10. OK?
    not necessary, you can hard reset your phone and then follow the guide
    p.s. after install PfD (step 4) don't open the application, don't enroll in program, simply go to step 5
    after update reset the phone again
    05-19-2015 12:47 PM
  8. DaniFerdel's Avatar
    This update is official? No errors, camera, battery, etc? Greetings
    05-20-2015 08:09 AM
  9. LTTG's Avatar
    This update is official? No errors, camera, battery, etc? Greetings
    Yes it's official. Never had any problems with it...
    05-20-2015 04:17 PM
  10. Dragone's Avatar
    I followed a similar procedure to get the Italian Cortana and fix the firmware update problem, I didn't trust Samsung to release a fix/new firmware soon and I preferred it this way.
    Yet, this time I'd rather wait for an official update (pfd/insider) for Ativ S without messing with the registries again as the issues between Microsoft and Samsung seem to be somewhat fixed and I expect to receive the update to 8.1.2 soon enough.
    I will still be able to follow this guide in a couple of months if I am proved wrong
    05-23-2015 02:44 AM
  11. romo11's Avatar
    Thanks! Now I have 8.10.15148.160, FW 2424.15.3.2
    05-24-2015 02:00 AM
  12. Dan Preda's Avatar
    less than a week ago i got 8.10.15137.148 and now they are seeding 8.10.15148.160
    still working hard on 8.1 not only W10
    05-24-2015 02:23 AM
  13. pankaj981's Avatar
    Placeholder: I'll give this a shot in the morning on my 635 and may be the 830 too. Want to try something here and hopefully it'll work.

    Edit: Did the registry edit and its currently going through the preparation process on my AT&T 635, looks kinda slow

    Edit 2: The process kept on failing (unable to open update) so I had to reset and currently updating to 14129 and will start with that OS

    Edit 3: Finally managed to get Update 2 on my AT&T 635 on Cyan firmware

    Edit 4: And the biggest LOL moment....I was able to install a non-AT&T Denim firmware on my AT&T Lumia 635. Now I have Denim + Update 2 on my AT&T Lumia 635...finally equalizer! LOL. From the numerous posts on xda-developers, I don't think anyone has managed to do this yet. I guess this is a big break through... (it might not work for RM-983 and RM-940 devices without damaging it).

    Edit 5: Just for fun, I impersonated a bunch of Lumia Devices (930, 1520, 640, 830, etc.) and managed to download & install some non-635 approved apps (Glance, Hey Cortana, Lumia Camera Beta, Lumia Camera 5.0, etc.) which I knew would not work and as expected, they did not. The only thing that worked was Lumia Moments and Lumia Camera Classic...its faster than the slow Lumia Camera w/ Denim on the 635.

    Edit 6: I was able to flash back to the LTA ROM and now the unlocked, unbranded US variant. Back to Update 2 or may be even 10

    Thanks a ton OP for posting this method!!
    Last edited by pankaj981; 05-26-2015 at 11:11 PM.
    grozaman and PepperdotNet like this.
    05-24-2015 03:16 AM
  14. Wahyu Ramadhan2's Avatar
    can you tell how i can get access to edit registry?
    it make headache..
    05-28-2015 12:21 AM
  15. Dan Preda's Avatar
    can you tell how i can get access to edit registry?
    it make headache..
    did you follow the guide from first page?
    what steps did you make until now?
    at which step are you stuck?
    05-28-2015 03:27 AM
  16. PepperdotNet's Avatar
    can you tell how i can get access to edit registry?
    it make headache..
    I too have followed all steps, PfD app installed to card, CustomWPSystem installed to phone, unlock SD card permissions, select customPFD XAP, I am stuck at when I touch apply, the app just exits back to the home screen instead of actually doing anything.

    I also have a headache now.
    05-28-2015 10:58 AM
  17. Dan Preda's Avatar
    I too have followed all steps, PfD app installed to card, CustomWPSystem installed to phone, unlock SD card permissions, select customPFD XAP, I am stuck at when I touch apply, the app just exits back to the home screen instead of actually doing anything.

    I also have a headache now.
    you put customPFD XAP on SD card?
    did you perform a hard reset? some people succeed after a hard reset, especially if they was on PfD or insider program
    which is your firmware?
    05-28-2015 11:13 AM
  18. PepperdotNet's Avatar
    you put customPFD XAP on SD card?
    did you perform a hard reset? some people succeed after a hard reset, especially if they was on PfD or insider program
    which is your firmware?
    yes, customPFD XAP on the SD card.
    I flashed the phone with current firmware before starting, so that should have been better than a hard reset.
    It is an AT&T Lumia 635 gophone. OS 8.10.12397.895 Firmware 01061.00070.14246.29017

    I'm trying to accomplish what pankaj981 did.
    05-28-2015 12:26 PM
  19. pankaj981's Avatar
    I have gone through this process like 5 times now (fooling around with the registry lol) and every time it worked. I guess I may have to write up a walk through guide for Lumia users since this may be the only solution to install non-AT&T ROM on AT&T devices.
    05-28-2015 02:20 PM
  20. PepperdotNet's Avatar
    That would be great, there must be some little thing I am missing.

    Would be nice also to figure out how to do it without an SD card, as I also have a Lumia 1020.

    Edit: Looks like even starting with a new flash, a hard reset was required. It worked this time, I've now unbranded my Lumia 635. Thanks for all the help.
    Last edited by PepperdotNet; 05-28-2015 at 11:56 PM.
    pankaj981 likes this.
    05-28-2015 09:08 PM
  21. Wahyu Ramadhan2's Avatar
    and now i cannot update to 14226..
    after i edit my registry, i cannot update to 14226..
    please help me..
    my phone: Ativ s, OS: 14192, firmware: 2424.15.3.2
    05-29-2015 02:02 AM
  22. Wahyu Ramadhan2's Avatar
    and now i cannot update to 14226..
    after i edit my registry, i cannot update to 14226..
    please help me..
    my phone: Ativ s, OS: 14192, firmware: 2424.15.3.2
    EDIT: when I was downloaded to get 14226, it say can't opened..
    Please help me..
    05-29-2015 08:02 AM
  23. PepperdotNet's Avatar
    OK, let me describe a very similar situation, using a Lumia 1020.

    Back when Windows Insider first came out, it could be "hacked" by using fiddler to install the W10 preview on phones other than what was on the list. I discovered while experimenting that it was in fact a rudimentary registry editor. I created a "flight" to change the registry on my 1020 changing the PhoneManufacturerModelName from "RM-877_nam_att_205" to "RM-877_nam_usa_957" and the PhoneMobileOperatorName from "ATT-US" to "000-US" so that it matches the unbranded RM-877 as sold unlocked from Microsoft. This all was before Denim was released for either variant.

    I would have thought that by now, I should see a Denim update available, and it would be the one for the usa_957 variant, and that it would accomplish what doing the regedit + update did for my L635 a few days ago (thanks again panka!)

    Unfortunately since all of that, the Windows Insider has gotten updated so the hack doesn't work anymore, and I used it to get the 8.1 update 2. That's the only thing I could think of that might get in the way of it finding a Denim update - does running Windows Insider make it impossible to get future firmware updates?

    Any other ideas of something I could try?

    *sorry for hijacking the thread - mod, if appropriate, split into a different thread please*
    Last edited by PepperdotNet; 06-01-2015 at 03:54 PM.
    06-01-2015 02:33 PM
  24. pankaj981's Avatar
    06-02-2015 11:07 PM
  25. djeire84's Avatar

    Proof that this does work. See screenshot so happy to have update 2.
    pankaj981 likes this.
    06-02-2015 11:31 PM
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