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  1. TechAbstract's Avatar
    I have been following this thread and decided to flash to the At&t Dev ROM yesterday. I have had a few issues with this rom. I have a tethering plan so when I first flashed it I went into settings to see if it would work. I got the msg to call At&t, so I did the keyboard trick and it worked. I noticed the WiFi connection would be on but it would use cellular data sometimes. I will keep an eye on that and report back to you. And the only other thing as of right now is the cellular connection. Sometimes I will have full bars and then there will be no bars. Once that happens it seems to jump back to close to full bars again. Call quality hasn't been a issue but its just what I noticed. Also it used to say LTE next to the reception on the original stock rom and now it only has a L next to the reception. I have noticed an H also next to the bars of reception. Like I said it hasn't been a problem yet because I haven't been on the phone when reception goes to nothing. If there is anything else I can think of I will add it later. Thanks
    Did you pick LTE1 or LTE2 in access point? And what stock rom was it on?
    08-28-2013 11:48 PM
  2. somubtech's Avatar
    I flashed AT&T rom this evening, and I had the same problems as "Erik Zellinger".

    I tried both LTE1 & LTE2 - I only get 3G, and it shows H occasionally. I checked the network speed, and I can confirm that it is not 4G/LTE.
    If anyone figures out how to enable 4G/LTE, please do post it here. Thanks.

    Other than the above issues, everything went fine, and all the apps are working smoothly.
    I am planning to flash AT&T Rom as soon as it gets released.
    08-29-2013 12:51 AM
  3. crav4speed's Avatar
    I flashed AT&T rom this evening, and I had the same problems as "Erik Zellinger".

    I tried both LTE1 & LTE2 - I only get 3G, and it shows H occasionally. I checked the network speed, and I can confirm that it is not 4G/LTE.
    If anyone figures out how to enable 4G/LTE, please do post it here. Thanks.

    Other than the above issues, everything went fine, and all the apps are working smoothly.
    I am planning to flash AT&T Rom as soon as it gets released.
    Did you check under settings > cellular > highest connection speed > 4g? It should already be enabled. My speeds at night with little to no congestion in New York City are around 17-20 mbps range which is definitely LTE. During the day I usually get 10-15 mbps which isn't bad for NYC. Also, unfortunately, you can't go back to the stock AT&T rom. No one has found a way yet. Something happens when you flash the Rogers rom that prohibits you from flashing back to the AT&T stock rom.

    I've been running the AT&T Dev rom for a couple of days now. Tethering still works, speeds are great, and network connections are solid... I'm definitely happy. I haven't seen the wifi issue but I guess that's because most of the time I'm on cell data and when I do use wifi, I always shut off my cell data connection.
    08-29-2013 02:02 AM
  4. somubtech's Avatar
    Did you check under settings > cellular > highest connection speed > 4g? It should already be enabled. My speeds at night with little to no congestion in New York City are around 17-20 mbps range which is definitely LTE. During the day I usually get 10-15 mbps which isn't bad for NYC. Also, unfortunately, you can't go back to the stock AT&T rom. No one has found a way yet. Something happens when you flash the Rogers rom that prohibits you from flashing back to the AT&T stock rom.

    I've been running the AT&T Dev rom for a couple of days now. Tethering still works, speeds are great, and network connections are solid... I'm definitely happy. I haven't seen the wifi issue but I guess that's because most of the time I'm on cell data and when I do use wifi, I always shut off my cell data connection.
    I did check the settings, and it is set to 4G. I use to get 17+ mbps, now I am getting only 3-4mbps. I believe im stuck with 3G :(
    Have couple of questions - Does your phone show 4G/LTE? Are you using LTE1 or LTE2? Did you just follow this post or you had to something different to get 4G.

    Just noticed that I do have the wifi issue on phone.

    I hope someone finds a way to flash the AT&T stock rom. fingers crosses.
    08-29-2013 02:12 AM
  5. dameon_03's Avatar
    Any ideas? I have tried every suggestion in this thread but I cannot get my phone into the mode to start flashing the 820 rom I held down the volume button waited for the vibrate and pressed retry. Also tried with power and volume down as well as waiting for the exclamation point to go away and pressing it. Also tried power and volume down and then holding in volume up to get the lighting bolt and gear screen and nothing seems to work. Any suggestions?
    08-29-2013 03:52 AM
  6. buddha747's Avatar
    I saw somebody, either here or XDA saying that reflashing solved the LTE issue for them, maybe that would work?
    Last edited by buddha747; 08-29-2013 at 11:19 AM.
    08-29-2013 06:38 AM
  7. dimpex_01's Avatar
    Thank you. The flash process was quick and painless. Running Amber on my Lumia 920 now.
    P.s.: I had one major remark. Please add in first post:
    2.1. Do not start Nokia Care Suite before point 2.2.
    2.2. Extract usergroupsconfiguration.cfg to C:\Program Files\Nokia\Nokia Care Suite\Product Support Tool For Store 5.0 or C:\Program Files (x86)\Nokia\Nokia Care Suite\Product Support Tool For Store 5.0 for 64-bit (Be sure to overwrite) After that it was OK.
    Last edited by dimpex_01; 08-30-2013 at 02:02 AM.
    08-29-2013 09:22 AM
  8. Ed Boland's Avatar
    I just had another thought about flashing and not being able to go back to at&t rom... Will I lose my at&t locker 50GB privileges?
    08-29-2013 10:31 AM
  9. captblaze's Avatar
    I just had another thought about flashing and not being able to go back to at&t rom... Will I lose my at&t locker 50GB privileges?
    Do yourself a favor and wait...

    Sent from my Xoom using Tapatalk 4
    08-29-2013 11:12 AM
  10. mamoranto's Avatar
    I just had another thought about flashing and not being able to go back to at&t rom... Will I lose my at&t locker 50GB privileges?
    No. I re-installed the app and I still have my 50GB.
    08-29-2013 11:53 AM
  11. crav4speed's Avatar
    I did check the settings, and it is set to 4G. I use to get 17+ mbps, now I am getting only 3-4mbps. I believe im stuck with 3G :(
    Have couple of questions - Does your phone show 4G/LTE? Are you using LTE1 or LTE2? Did you just follow this post or you had to something different to get 4G.

    Just noticed that I do have the wifi issue on phone.

    I hope someone finds a way to flash the AT&T stock rom. fingers crosses.
    I did nothing special. Followed Juan's directions using VisceralMonkey's soft-reset method (post #34) and everything worked fine. There seems to be people who are happy with either LTE1 or LTE2. I chose LTE2 because I've always prefered the "phone" apn over the "pta" apn. I haven't had a problem yet. The Euro Dev and AT&T roms I flashed show "L" meaning LTE. I can see L, H+, H, E ( I've never been in a situation to see G).
    08-29-2013 12:12 PM
  12. epzelli's Avatar
    I flashed my 920 to the ATT Dev Rom. Everything went smoothly. I also have an L where the LTE used to be on the stock rom. I fooled with the APN settings but it didn't matter. I did a speed test and are getting 4G/LTE speeds. I noticed under cellular settings under highest connection speed it is set to 4G. On the stock original rom it had LTE as an option but whatever as I am getting good speeds. Also I pay for tethering, so when I flashed it I got the msg to call ATT. I downloaded the Spanish keyboard and now I have tethering back. I also noticed when having wifi on it would still use cellular data sometimes. Will have to keep an eye on it.

    I just wanted to say, before I flashed it to the ATT Dev Rom, I flashed it to the Rogers Rom. After I flashed it to the Rogers Rom I went through 3-4 OTA updates and that got me to the AMBER most recent. I didn't have to flash it using the French or ATT Dev rom. I only had it on the Rogers Rom for about a half hour then decided to flash it to the ATT DEV Rom. As far as the Rogers Rom, I did notice I had LTE and not the "L" on the ATT Dev Rom. Didn't notice anything else as I was only on the Rogers Rom for a short time. Just thought I would add this to the original post. Thanks
    juan6996 likes this.
    08-29-2013 01:10 PM
  13. hoovermac's Avatar
    That's because LTE IS 4G. LTE is a 4G technology...in the same way that UMTS and HSPA are 3G technologies...
    Ummm - yeah, I knew that. What I was trying to point out is that my pre-flashed L920 (and my Z10) showed 4G and LTE on the same networks where my flashed L920 with the AU CV ROM displayed H+ and 4G with no connectivity issues whatsoever. All the designations (4G, LTE, and 4G-LTE) are used in North America depending on the carrier - it could cause some confusion if someone wanted to flash the non-North American ROM and saw 4G (i.e., no LTE) as the highest possible connection speed.
    08-29-2013 05:56 PM
  14. somubtech's Avatar
    I did nothing special. Followed Juan's directions using VisceralMonkey's soft-reset method (post #34) and everything worked fine. There seems to be people who are happy with either LTE1 or LTE2. I chose LTE2 because I've always prefered the "phone" apn over the "pta" apn. I haven't had a problem yet. The Euro Dev and AT&T roms I flashed show "L" meaning LTE. I can see L, H+, H, E ( I've never been in a situation to see G).
    This morning at work I did see L on my phone, and I immediately checked the speed.. I got 20mbps.. wow! So, thats a good news.
    But I have reception issues, signal drops intermittently for no reason. I will try to switch to LTE2 and see if it helps with reception.

    Regarding tethering, I have a paid plan for tethering. I was able to get it working, however, when I removed the Spanish keyboard, tethering didnt work. Should I download and do not delete it?
    08-29-2013 07:05 PM
  15. VisceralMonkey's Avatar
    Just a quick update: My tethering that was enabled by this thread/French ROM and the spanish keyboard trick is still working. No issues.
    juan6996 likes this.
    08-29-2013 09:32 PM
  16. juan6996's Avatar
    Just a quick update: My tethering that was enabled by this thread/French ROM and the spanish keyboard trick is still working. No issues.
    Just a quick update: I'm still very jealous that you got it to work...
    08-29-2013 10:04 PM
  17. epzelli's Avatar
    Well, I decided to flash back to the Roger Rom last night and everything went smoothly. I have the "LTE" next to the reception bars instead of the "L" like on the ATT Dev Rom. I had to so the keyboard trick in order to get the tethering to work, but when I checked the tethering this morning it wasn't working. Gives me the call ATT or go to the website. For whatever reason the tethering stopped working. The reception is more stable on the Rogers Rom rather than the ATT Dev Rom. Also, once connected to WiFi it actually uses the WiFi connection. On the ATT Dev Rom I noticed even though I was connected to WiFi, it would still use cellular data. I am happier with the Rogers Rom. Just need to figure out the tethering.
    08-30-2013 11:06 AM
  18. EngineerTuna's Avatar
    I'm trying to updte my AT&T Nokia Lumia 920 black to amber but stuck on the step 5. Product Support Tool does not allow me to click on programming as you see in the screenshot.
    Can anybody help me on this? I'm using the files shared on the skydrive
    Attachment 40503
    I'm having the same problem. I reinstalled. My system is Windows 7 x64 Enterprise (all updates done, and all programs installed as instructed.)
    08-30-2013 12:03 PM
  19. Ohsneezeme's Avatar
    I can't get past step 5. I keep getting an application error from NCS. Error code: ",",hexadecimal value 0x00. is an invalid character. Line 1.0, position1.
    08-30-2013 02:19 PM
  20. invictus_7's Avatar
    If I do flash my L920, will it recieve the WindowsPhone 8.1?
    08-30-2013 04:25 PM
  21. Mio_WP's Avatar
    Sure. I flashed to Portico and got Amber OTA

    Sent from my Lumia 920 using Tapatalk
    08-30-2013 04:32 PM
  22. Narse77's Avatar
    12 step programs scare me 😉
    juan6996 likes this.
    08-30-2013 05:08 PM
  23. pankaj981's Avatar
    Don't want to hijack the thread but for people having issues w/ reception can try the EURO Dev ROM (Product Code 059R4H6), the signal is definitely better than the stock Rogers ROM (RM-820 w/ AWS) on LTE/HSPA+.
    08-30-2013 08:34 PM
  24. TechAbstract's Avatar
    Just a quick update: My tethering that was enabled by this thread/French ROM and the spanish keyboard trick is still working. No issues.
    As long as I don't go back to the Access Point setting, my tethering will work forever.
    08-30-2013 08:53 PM
  25. Derausgewanderte's Avatar
    This morning at work I did see L on my phone, and I immediately checked the speed.. I got 20mbps.. wow! So, thats a good news.
    But I have reception issues, signal drops intermittently for no reason. I will try to switch to LTE2 and see if it helps with reception.
    with many folks here reporting connections issues on GDR2/Amber, I am wondering if that is a hold-up in ATT's release which they are trying to fix together with Nokia.
    08-30-2013 09:52 PM
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