Just got my 1st 650 replacement from Sprint. The old 650 was working fine relatively then all of a sudden Vision stopped working (no web or email- only get a white screen, but voice works fine). Called Tier II and tried to reprovision the phone 4 or 5 times unsuccessfully. Tier II says nothing more he can do and told me to go to Sprint store to get it tested. Tech at Sprint store could not get Vision to work either and reluctantly, after some nudging, gave me a new 650. I'll see how well the new 650 holds up. Anyone else had this problem with the 650? Just curious.