I joined up just to discuss this.....My Rezound does the same thing when I change the battery....I've called 3 times and the first time they just told me to factory reset my phone, the second time the rep told me it was probably my virus protection "Lookout" and it has happened a 3rd time but I lost hope in calling.....I called and ask what were my options for a different phone since this phone isn't working after I change the battery and they told me my best options were the "Thunderbolt" and the "Droid Charge" and told me the Nexus and Razr were too advanced to exchange for (Even though the 2 other phones aren't Dual Core)....I gave up on having a second batter :-(