Same problem. I'm in maryland, Baltimore has LTE, but even when I'm in baltimore I can't get data to work (speed test app will ping but that it).
In Owings Mills MD its finicky, I have to restart the phone a lot. In Carroll county, its only hspa, but data continuously works.
Seems like a coverage issue when I'm bouncing between umts, hspa and LTE.
VERY frustrating
I live around that area and was thinking about trying out At&ts lte network out due to having similar problems with Verizons network when switching between 3g and 4g. I have been eyeing the GSII for awhile now but if they both have the same data issues I might as well stick with Verizon.