I bought two Optimus V phones this past Saturday and was having 3G drops when I activated both on Tuesday. The 3G would go out and no Internet on both phones. The next day I was going to return the phones. I took the battery cover off to take out the battery and noticed I did not remove the plastic at the bottom of the phones. It covers the silver bottom. Once removed, the 3G started working correctly.
Also, my bars stop fluctuating. It is now a consistent 3-4 bars not the 1 to 4 it was doing with the plastic.