After doing a back up of my phone last night, it also said there was a phone update which I did and installed Jellybean 4.1.2. Now all it shows is H, sometimes H+ or 3G. Before I did this update I used to show 4G!! Also on network it only allows GSM, WCDMA or AUTO. Also had to find and manually set the APN after much google searching as it wouldn't connect to data either after the upgrade. How do I get 4G back PLEASSSSEEEEEE!!!!