1. PaulosV's Avatar
    Hi folks,
    I'd like to share some experience with you that I'm having since some "recent" update on my Samsung Omnia 7, I'm hoping you might have the same issue.
    Simply put - when WiFi and mobile data (3G, EDGE) are turned on together, a situation often happens that neither of them works properly. I am connected to the 3G network of my provider and concurrently to my WiFi network at home and I can't access the Internet! I must turn one off and then data start flowing again.

    Tweeting with @WinPhoneSupport brought one thing: "go and exchange your phone". I didn't want to do that so I went deeper and searched the forums; for example, on our local forum (on Smartmania.cz), we have dozen of different devices of different manufacturers that have this issue! (Even a Lumia 800 or a Titan have this problem).

    The @WinPhoneSupport has also asked me to ask my provider: so I've spoken with T-Mobile Czech; according to them, it is probably a SW glitch of WP7, they see nothing wrong in their systems.

    Hard reset did not help. Can't revert to 7740 because the backup was corrupted.

    Help! Anyone! :/
    06-14-2012 10:58 AM
  2. selfcreation's Avatar
    i would send your phone in for repair or exchange .. 100% a problem..

    not suppose to have that kind of problem

    when connected to WIFI your 3G doesn't get used.
    When WIFI is OFF then 3G gets used

    not suppose to be fighting for a connecting between WIFI and 3G...and that is what seems to be happening.

    06-14-2012 11:08 AM
  3. theefman's Avatar
    As it affects other devices (experienced this on my 900 and Radar) its definitely pointing to an OS issue. Not much you can do apart from not use both at the same time.
    06-14-2012 11:09 AM
  4. Corepc's Avatar
    Found this on xda..seems related..you could try the step's listed at bottom of this thread, you may have to unlock your phone and use registry tools...

    [Issue]No Internet if both WiFi and 3G ate ON.. - xda-developers

    you may be able to find the 7740 cab's on xda if you look hard enough and manually updated back to 7740..
    06-14-2012 11:10 AM
  5. PaulosV's Avatar
    Thanks everybody for your responses; I think this article sums it up nicely:
    http://www.windowscentral.com/nokia-...ng-wifi-issues
    And Lumia 900 is definitely not the only WP7 phone which has these issues; it has to be a glitch in the system.

    Corepc, I can try that but I have to backup my phone first. Still thanks for finding this for me.
    06-15-2012 12:05 PM
  6. N8ter's Avatar
    @ OP: Have you ever used Internet Sharing on your Omnia?
    06-15-2012 03:54 PM
  7. PaulosV's Avatar
    @ N8ter: Several times, the last time I tried it, it didn't even work properly (connected but 3G data not flowing). And I've already seen some reports that Internet Sharing could cause this, however I needed it so I turned it on.
    06-15-2012 04:34 PM
  8. jimski's Avatar
    Been running data and WiFi on my L900 since the day I got it, with (nearly) no problems. I turn off WiFi occasionally to test LTE speeds and the phone works fine.

    Last week I did have a situation where I was out of WiFi range and although LTE showed a strong signal, I had no data. Toggled Airplane mode and all was good again.

    Sent from my Lumia 900 using Board Express Pro
    06-15-2012 05:53 PM

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