1. Leaver's Avatar
    So I've had a Lumia 900 for almost a week now--decided to give it a try instead of the iPhone 5, to see if I'd prefer to go to a 920. So far I'm liking it, but I have an issue with the LTE connection.

    The phone will switch from LTE to 4g and never go back until the radio is restarted via switching to Airplane mode and back.

    Is anyone else having this problem? I have all updates installed.
    10-08-2012 09:59 AM
  2. DeWize1's Avatar
    I had this problem for a little after returning to the states from China. I had contacted ATT to see if it was just a tower issue, but they told me all the towers were up in my area. Restarting my phone did nothing either, so eventually I just removed the SIM and put it back in, and LTE came right back on and no more problems. I hope this helps. BTW i have a Lumia 900 too.
    10-08-2012 10:08 AM
  3. wamsille's Avatar
    I had mine do that this morning. My previous Lumia didn't do this to me and it was a white Lumia 900 that I purchased from an AT&T corporate store. Not sure if one model, batch or color is more prone to radio issues than the others but I cannot get mad about it unless it happens more often. To be fair, my HTC One X did this several times.
    10-08-2012 11:20 AM
  4. mindfrost82's Avatar
    I've had a few phones do this...before LTE, it was an issue switching between 3G and Edge.

    My 900 will do it on occassion, but not very often and I'll either toggle Airplane Mode or just reboot the phone to get out any quirks (which I usually don't have to do with WP compared to Android and even iPhone).
    10-08-2012 12:11 PM
  5. Leaver's Avatar
    Tried removing and reinserting the sim, but still have the problem. Seems to be mostly at home though--at least today I haven't noticed it anywhere else. I get a good 3-4 bars on LTE at home, so I'm not sure what the issue would be there.

    I've never noticed losing LTE on my iPad at home, but this is the first LTE capable phone I've had. It happens multiple time through the day at home. Once LTE drops and the phone reads 4G it will never pick up LTE again until the radio is cycled.
    10-08-2012 06:18 PM
  6. Xsever's Avatar
    Tried removing and reinserting the sim, but still have the problem. Seems to be mostly at home though--at least today I haven't noticed it anywhere else. I get a good 3-4 bars on LTE at home, so I'm not sure what the issue would be there.

    I've never noticed losing LTE on my iPad at home, but this is the first LTE capable phone I've had. It happens multiple time through the day at home. Once LTE drops and the phone reads 4G it will never pick up LTE again until the radio is cycled.
    Download the network setup app and make sure the LTE setting is setting is selected. On mine I can choose the 3G settings or the LTE settings.

    Maybe this will solve it.
    10-08-2012 08:47 PM
  7. jimski's Avatar
    Did you get a new micro-SIM with the L900? The micro-SIM needs to be provisioned for LTE. Just a thought.

    Sent from my Lumia 900 using Board Express Pro
    10-08-2012 10:00 PM
  8. Leaver's Avatar
    Doesn't the fact that I do get LTE suggest the SIM is provisioned for LTE? Would I even get LTE if it wasn't?

    I've just downloaded the Network Setup app, and it gives me three options:

    AT&T - LTE 1 - Lumia 900
    AT&T - LTE 2 - Lumia 900
    AT&T 3G

    It was set to LTE 1, but I've changed it to LTE 2 just to see what happens. I did this while stuck in 4G mode, and it didn't change to LTE until I cycled the radio via airplane mode.

    Not to change the thread direction--but I'll also mention that for some reason, I cannot get texts through to this phone from outside of AT&T. Other AT&T sources can text me fine, but other carriers cannot. AT&T claims the provisioning is all correct. It is a newly ported in number as of a week ago.
    10-09-2012 11:48 AM
  9. hossiam's Avatar
    Download the network setup app and make sure the LTE setting is setting is selected. On mine I can choose the 3G settings or the LTE settings.

    Maybe this will solve it.
    how were you able to download the network set up app? I also live in Canada and it is not allowing me.
    10-09-2012 11:54 AM
  10. Xsever's Avatar
    how were you able to download the network set up app? I also live in Canada and it is not allowing me.
    The Lumia I have is a replacement which Nokia directly sent me. I have access to many apps Canadian users don't. I was just lucky with the device I got I guess.
    10-09-2012 09:03 PM
  11. jimski's Avatar
    Doesn't the fact that I do get LTE suggest the SIM is provisioned for LTE? Would I even get LTE if it wasn't?
    .
    Well, I am not an AT&T Engineer, so I don't know. But I do read alot, and several users who moved their micro SIM from iPhone to L900 had erratic data issues, so it was a question.

    But it sounds like you answered the question anyway. When all else fails, there is always a hard reset. Has been known to solve lots of mysteries.

    Sent from my Lumia 900 using Board Express Pro
    10-09-2012 09:56 PM
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