Share your experience!
After updating my Sony Xperia L phone to the new Jelly Bean 4.2.2 update, my mobile data isn't working. I've tried turning the mobile data off and on again, turning my phone off and taking the battery out, and none of them have worked. Please help!
Relax dude!
You just need to download the internet settings again!
For that Go to Settings> Xperia> Internet settings, and tap it, and you're good to go! 
A lot of thanks UGeek11. Now my mobile data go perfectly. Thanks 
Tried everything.. installed internet settings, restarted. but still not working