For a TEMPORARY (i.e. until next restart) fix to force LTE only on the Bionic you can enter program mode (dial ##PROGRAM, password is 000000)
Go to 'test mode'
click 'next' twice
from there you can select 'network mode' and set it to LTE only.
This will last until you reboot the phone and then it will revert to prior settings.
I use this menu to move to EVRC-B for voice quality.
Just remember if your LTE signal gets too weak you will flat out lose data instead of having the Bionic try to connect at 3G or 1x.
very nice, thanks for that - have you seen/found a setting in there to change to evdo from ehrpd?