my Evo lte stays connected to lte after i airplane it, but will take some time too canect on its ownelps , i changed the scan timer to 15 it was 30 it helps a little pit im thinks of changing it to 5 and see if that helps and change it to sprint only but im also in LA so its not offical lonched yet so i may wait to see if it makes a diffence when its offical to make changes