I want to switch from my Eris to the X, how are you guys switching without out paying full retail? I got the Eris the day it came out, so I'm not due an upgrade yet. And I really don't want to add another line to my plan. Any suggestions on dealing with Customer service , trying to upgrade without adding a line? I've had so many issues with the Eris and they just want to keep trying to put a bandaid on the problems.