[ycats]

from dialpad, ##debug#, lower-left, tap Debug Info, HDR, last line needs to say 1=Authenticated
from dialpad, ##3282#, MSL number:
Active Profile should be set to 1 (normally this what you check for if you're not getting a data connection)
from dialpad, ##778#, edit, MSL number, lower-left, tap View info, Modem Settings:
Preferred Serving System and Preferred Mode should both be set to "automatic", HDR Hybrid Preferred should be "enable"