07-24-2014 02:27 PM
31 12
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  1. MrGoodSmith's Avatar
    I can't use mobile data, and it reboots the phone. RM-938 is not compatible with this specific rom.
    I would be surprised if this had worked. Usually you can't flash a different product type ROM into a phone.
    07-24-2014 01:56 AM
  2. Tracy Daken's Avatar
    I was able to do it on the Lumia 920 a long time ago and it worked pretty well. It turned on the AWS bands for tmobile. I had to try lol. So hardware is def different between RM-937, and RM-938.
    I got cyan and all the updates through wifi. Airplane mode keep switch off and on superfast. So I downgraded to the same UK rom to 8.0 and put my sim in and tried to get it to work.
    Every time I did, phone would say GSM mode turned on, and it would reboot.
    FYI Cyan feels way more polished than DP. I checked out the camera though before going back. Very crisp compared to 8.0 and DP. I think it is a good upgrade.
    That's my info. Recap, "PUTTING A RM-937 ROM ON A RM-938 WILL RESULT IN SIM CARD REBOOT. IT WILL NOT WORK."
    John Mumpitz likes this.
    07-24-2014 02:04 AM
  3. John Mumpitz's Avatar
    First of all, thank you all for your kind and really helpful anders.

    So I just flash the old 8.0 rom, using this way: [Tutorial] Unbrand (flash) all Nokia Windows€ | Windows Phone 8 | XDA Forum and use a product code from UK, INDIA or Finland, correct?
    Is it OK to use any Product Code from those countries, or do I have to use a special one from that country? Because according to: Availability in Europe - Nokia all lumia 1520 firmwares are "under testing" lol. So, I'm not sure, if I'm getting the update to 8.1 OTA.

    And, of course, you have to use the same RM-code. You can find the RM-Code on your package. Because they have differenct radios etc. An american phone wouldn't work in europe, because of different Radios. So use a product code from the same RM-Code. :)
    Last edited by John Mumpitz; 07-24-2014 at 05:42 AM.
    Tracy Daken likes this.
    07-24-2014 04:47 AM
  4. flatronics's Avatar
    I don't think you can use any RM937 rom to any carrier specific Phones, this is because they have different hardware like radios. You would just break your phone.. To those who have RM937 and wanted to flash UK unbranded rom make sure you download RM937 match with correct product code and I think its also important to pick the rom for the same color of the phone that you have. I am from Philippines I have Black 1520, installed UK rom a few days ago and enjoying cyan.
    07-24-2014 01:13 PM
  5. Tracy Daken's Avatar
    First of all, thank you all for your kind and really helpful anders.

    So I just flash the old 8.0 rom, using this way: [Tutorial] Unbrand (flash) all Nokia Windows€ | Windows Phone 8 | XDA Forum and use a product code from UK, INDIA or Finland, correct?
    Is it OK to use any Product Code from those countries, or do I have to use a special one from that country? Because according to: Availability in Europe - Nokia all lumia 1520 firmwares are "under testing" lol. So, I'm not sure, if I'm getting the update to 8.1 OTA.

    And, of course, you have to use the same RM-code. You can find the RM-Code on your package. Because they have differenct radios etc. An american phone wouldn't work in europe, because of different Radios. So use a product code from the same RM-Code. :)
    If you have a RM-937, this one will work. Just search RM-937 and 059V337 RM-937 VAR EURO GB CV BLACK . This should get you the one that will upgrade to cyan. I upgraded to cyan twice last night. SEcond time I got data on 8.0 UK. When it upgraded to 8.1, Airplane mode locked me out. I am on a Rm-938. But yep. If you are on a RM-937, this will work. and it is unbranded.

    ATT Rm-940 is here: http://fujicelular.blogspot.com/2014...a-1520-rm.html So check these out to confirm codes. Going to See if the 1520.3 works well with a US variant. Wish me luck.
    RM-940 Rom will shoots up Error Code for the RM-938 at the Rom loading step. FFU does not support platform. So just have to wait until Mexico gets their update. lol.
    Last edited by Tracy Daken; 07-24-2014 at 02:37 PM.
    07-24-2014 02:20 PM
  6. blue1k's Avatar
    I don't think you can use any RM937 rom to any carrier specific Phones, this is because they have different hardware like radios. You would just break your phone.. To those who have RM937 and wanted to flash UK unbranded rom make sure you download RM937 match with correct product code and I think its also important to pick the rom for the same color of the phone that you have. I am from Philippines I have Black 1520, installed UK rom a few days ago and enjoying cyan.
    Good advice. I did the same swapping from a HK CV rom to a UK CV rom with same color code to get cyan.
    Tracy Daken likes this.
    07-24-2014 02:27 PM
31 12

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