Gmail app doesn't sync email at all when on Mobile Data 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?
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.