06-09-2016 05:41 PM
28 12
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  1. newnews's Avatar
    My 950XL does not get LTE on AT&T, it is always showing 4G. My sim card is originally used on 1520 which has LTE all the time. I tried to do factory reset with SIM card inside, the problem is still there. I also manually create APN, no luck. Phone itself has no problem.

    What else should I do?

    Edit: Call ATT service to add my new phone IMEI to their system, changed the SIM card, now the phone shows LTE instead of 4G.
    Last edited by newnews; 05-04-2016 at 01:43 PM.
    05-02-2016 09:34 AM
  2. tsax6010's Avatar
    What did you use for your APN settings?

    I set mine to this and have no issues getting LTE as a newly converted customer when I purchased my 950XL

    APN: NXTGENPHONE
    IP type: IPv4v6

    Everything else blank or "None". Make sure to check the boxes to "Use this for LTE..." and "Apply this profile"

    The Default APN was working fine for me too, but I chose to make custom ones for LTE and MMS after reading a lot on the topic here and elsewhere.
    pakmul and mskoch123 like this.
    05-02-2016 09:44 AM
  3. newnews's Avatar
    I tried your APN setting, still no luck.
    05-02-2016 02:00 PM
  4. TheJoester09's Avatar
    Mine doesn't show "4G" but I'm definitely only getting 4G speed. I get around 10mbps on my RM-1085, while my girlfriend gets 25-30 on her Galaxy S6 Edge+ sitting right next to me. I put her SIM card in my phone and managed to get it up to the 25-30, but putting my SIM back in still only registered 5-10. I'm going to go to AT&T later and see if they'll give me a new SIM, but have them activate it in an AT&T-branded phone first to see if that will make any difference. I'll report back if the results are good.
    05-02-2016 02:15 PM
  5. pakmul's Avatar
    Originally posted by tsax6010
    What did you use for your APN settings?

    I set mine to this and have no issues getting LTE as a newly converted customer when I purchased my 950XL

    APN: NXTGENPHONE
    IP type: IPv4v6

    Everything else blank or "None". Make sure to check the boxes to "Use this for LTE..." and "Apply this profile"

    The Default APN was working fine for me too, but I chose to make custom ones for LTE and MMS after reading a lot on the topic here and elsewhere.
    Where/how to view and set the APN ?
    05-02-2016 03:06 PM
  6. Roscoe T Zern's Avatar
    I am w ATT and having the same issue. I already got new Sims (dual sim version) and no improvement, then got a new phone and put the new sims in and has some improvement for a week. Now its back to E connection on the data sim. when I speed check it I am getting EDGE speeds... its a mess.
    05-02-2016 03:14 PM
  7. tsax6010's Avatar
    Where/how to view and set the APN ?
    It is a mess to get to the APN settings

    Quickest way (in my opinion):

    Settings --> Search for "sim" --> Cellular & SIM --> SIM 1 Settings (or SIM 2 based on your configuration)
    05-02-2016 03:53 PM
  8. Thazal's Avatar
    See this blog entry by Windows Central from back in November. Here is why you are not getting full LTE on AT&T when using the Lumia 950 XL

    Hope this helps.
    05-02-2016 05:58 PM
  9. newnews's Avatar
    See this blog entry by Windows Central from back in November. Here is why you are not getting full LTE on AT&T when using the Lumia 950 XL

    Hope this helps.
    This is not the problem here, so it does not help at all for my case.
    05-02-2016 06:08 PM
  10. Thazal's Avatar
    This is not the problem here, so it does not help at all for my case.
    What's the difference? My 950xl was only 4G until I was able to get AT&T to provision the sim card to a AT&T 640 imei #, the sim wouldn't take to my AT&T 920 imei #.
    xandros9 and aximtreo like this.
    05-02-2016 06:17 PM
  11. Roscoe T Zern's Avatar
    already did the IMEI registration w ATT. They did not have a problem with it being an unlocked 950xl dual sim. even when the phone does show LTE it moves data at sloth like speeds: max 4 down and 1 up.... ugh
    05-03-2016 08:56 AM
  12. TheJoester09's Avatar
    already did the IMEI registration w ATT. They did not have a problem with it being an unlocked 950xl dual sim. even when the phone does show LTE it moves data at sloth like speeds: max 4 down and 1 up.... ugh
    This is my issue too. I'm still convinced that it's a SIM card issue though because I get great speeds when I put my girlfriend's SIM card in my phone.
    05-03-2016 09:03 AM
  13. Roscoe T Zern's Avatar
    hm that is strange, as I am on my second set of SIMs from two different ATT stores...
    05-03-2016 09:24 AM
  14. ChumsFuture's Avatar
    My dual sim XL picks up LTE just fine. Used an old micro sim that I cut down to nano with a sim trimming tool.
    05-03-2016 09:42 AM
  15. Roscoe T Zern's Avatar
    I put in the APN settings as suggested above, rebooted and saw some improvement in speed, 5 down 5 up.
    05-03-2016 09:53 AM
  16. tsax6010's Avatar
    I put in the APN settings as suggested above, rebooted and saw some improvement in speed, 5 down 5 up.
    My experience has been that AT&T (compared to Verizon which is where I have been for years up until switching just last week) is much more variable on LTE speeds depending on the area. At my work I get 3-7 down and 2-3 up. 10 miles away at home I get 17-21 down and 10 or so up. Both suburban areas and about 3 bars shown on the phone at both locations.
    05-03-2016 10:04 AM
  17. newnews's Avatar
    What's the difference? My 950xl was only 4G until I was able to get AT&T to provision the sim card to a AT&T 640 imei #, the sim wouldn't take to my AT&T 920 imei #.
    Ok, I could go to ATT store to get new SIM and try out
    05-03-2016 03:23 PM
  18. TheJoester09's Avatar
    Ok, I could go to ATT store to get new SIM and try out
    If you do that, ask them if they'll activate it in the floor model first before putting it in your phone and see if that makes a difference. I think having in an AT&T branded LTE phone first is the key...
    05-03-2016 03:31 PM
  19. newnews's Avatar
    I called ATT, they added IMEI of Lumia 950XL to their system, and I also put a new SIM card. Now I get LTE indicated. Anyhow, I do not see any difference on speed. The speed test shows no difference on LTE and 4G previously (11M download and 5M upload).
    05-03-2016 05:54 PM
  20. slyronit's Avatar
    4G is LTE. Whether they show 4G or LTE depends on the phone model. My Lumia 920 shows LTE and My 950XL shows 4G on the same network. I think what it shows can also be changed via a registry hack.
    05-04-2016 02:37 AM
  21. TechFreak1's Avatar
    Has anyone tried the following

    1. Turn off phone
    2. Remove sim
    3. Turn on phone and wait a few minutes
    4. Turn off phone and insert sim
    5. Turn on phone.

    or (plug your phone into a pc / laptop and back up personal files and use the back up settings to back your phone before attempting the next step as it involves a factory reset).


    1. Remove sim
    2. factory reset
    3. turn off phone immediately after it has completed
    4. Place in sim and go through the out of box experience.


    If it doesn't work, try resetting with the sim inside the phone.
    05-04-2016 09:22 AM
  22. cincykid76's Avatar
    My signal is crap too... Anyone had any luck
    05-22-2016 12:32 AM
  23. falconrap's Avatar
    The signal on my 950XL is about the same on AT&T as my Icon was on Verizon. The VZW signal is better in certain spots of the facility I work at, but, throughout the Tampa Bay Area, I've gotten similar signal strength. Mostly LTE, with it occasionally going to 4G. I live in NW Hillsborough in a mostly rural area (just minutes from suburbs) and I just pulled 15Mbps down and 3Mbps up on LTE (varying 2 to 3 bars). Speeds will vary based on signal strength and tower saturation. Each tower has a certain amount of bandwidth, so, even if you have 4 or 5 bars, if a lot of people are using data on that tower at the time you test, you may get slow speeds. Way too many factors to consider here.

    As far as the op and others having the no LTE problem are concerned, I've noted in two other threads that the correct way to do this is to go to a corporate AT&T store, preferably before your phone is powered and setup, and have them properly provision a SIM for your 950XL. Once done, pop it in, THEN power up and setup the phone. The vast majority of people either setup the phone first without the SIM, or didn't use a SIM provisioned by AT&T and boot the phone with it first. This method appears to be a surefire success, but I would be leery of the retail only stores.
    05-27-2016 05:15 PM
  24. newnews's Avatar
    I went to Canada and using roaming service on Bell network, I lost LTE again after I come back to US. It is really sucks!
    05-28-2016 11:21 PM
  25. mggm100's Avatar
    FWIW ... I picked up a 950 XL this week. I also picked up a new SIM card because my 1020 used a different size and I really didn't want to mess with cutting it down. I did put the new SIM in the 950 XL before powering it up for the first time. Once the initial setup was complete, I called AT&T to activate the new SIM. There has been no problem with getting LTE.
    05-29-2016 05:52 AM
28 12

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