I don't know if this will help at all but try this..
Dial ##778#
Select Edit Mode
Password: 000000
Select: Modem Settings
Select: Rev A.
Select: Enable.
Hit: OK.
Hit: menu button.
Hit: Commit Modifications.
Hit yes to restart.
What this will do is put you on a seperate 3g/4g tower made for smart phones with larger bandwidth that is needed. This was origanally made for the HTC Thunderbolt but it also works with some other 4g Verizon devices.
-Good Luck