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I have a Samsung Galaxy S3 and I love the new Gmail app. Works awesome. My only problem is that it doesn't sync emails (I don't receive any new notifications when new emails arrive, I have to manually click refresh in the app which is annoying) when I'm on Mobile Data. When I'm on Wifi I receive notifications almost instantly. I've searched on Google Help but couldn't find anything.

I guess I could use the Email app but I don't like that as much as the Gmail app.

What could be the problem?

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Please, don't sign your posts, your signature is already on the bottom of the post –  Markissimo Nov 22 '12 at 18:18
    
Also, are you running any custom ROM or it's stock? –  Markissimo Nov 22 '12 at 18:34
    
It's possible that your phone is set to restrict data while on Mobile Data -- Android 4.0 and newer have this feature. Poke around in the settings and see if that's the case. –  offby1 Nov 23 '12 at 0:30
    
I've upgraded to Jelly bean and I have the same problem. Found that setting in Settings > Mobile Data > Gmail > "Restrict background data" but it's disabled so that's not it... –  Cris Nov 27 '12 at 6:06
    
I did a factory reset and that didn't solve the problem. –  Cris Nov 27 '12 at 7:05
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6 Answers

If none of the other things work, go to Apps > Google services framework. Click Clear cache and data button. Then, reboot.

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It might be caused by a proxy server configured in the APN. See this question: Google apps losing connection to the servers when on mobile data.

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up vote 1 down vote accepted

Found out the problem. Orange Wap was selected instead of Orange Internet in Settings > Access Point Names.

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Yes, this sync was my problem too...just tried below settings and worked:

  1. Go to Settings
  2. then to Data usage
  3. click Menu button
  4. check Auto Sync

Now go to your Account section where you should see all account syncs are enabled :)

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Ensure that on the device Settings | Data usage | Mobile | Mobile data is set to ON and that if Set mobile data limit is checked that you haven't reached that limit.

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It's on and there's no limit. I've updated to Jellybean and I have the same problem. –  Cris Nov 27 '12 at 6:05
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Are you sure that the Sync option is enabled for gmail?

Go to Settings->Accounts->Google->Your account -> Gmail this last must be checked.

Also check if the Sync option is active at all.

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Thanks for the reply. Yes, my Gmail & everything from google on Accounts and sync is checked. It works fine when on Wifi, just not on mobile data. –  Cris Nov 22 '12 at 18:28
    
Try to clean the app data. Go to Manage Apps->Search for Gmail app->Clear Data and Clear Cache –  Markissimo Nov 22 '12 at 18:32
    
done and still doesn't work –  Cris Nov 22 '12 at 19:27
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