Hi guys! I'm upgrading on Verizon from a 4S to a 6+ (preorder - expected delivery at the end of October) using the $200 trade in credit. My 4S lived its life in an Otterbox defender (ugly, yes); it's in pristine condition. Until today, when the sleep button magically, randomly got "stuck," so I can't turn the phone off. Is it totally necessary that this works for the Verizon trade? Is there an easy fix? I'm aware that this is a known issue. Obviously I would hate to spend $$ on a fix for a phone I'm trading. Suggestions? Thanks!