_My_ v3 didn't work well in general.    

One hack you could try is to take a tiny bit of aluminum foil to the
top of the broad side of the usb connector to fill up some space and
tighten that outer connection.

If it's the in the interior part of the conenctor that's a problem,
that's a much harder thing to solve--no good way to do it without a
new jack and doing that repair won't be any fun with the pitch of
those contacts.   I'm not even sure those can be manually soldered.  

All sounds like a great excuse for a new phone.  :-)    

--
Todd H.  
http://toddh.net/