I've had my phone for about a month now, and it always charged perfectly fine. I was also charging it earlier today. But now, my phone refuses to charge. I've tried: different outlets, different cords, charging through my computer, removing the battery, restarting my phone several times.. I'm temporarily using (and charging with the same cords/outlets) my Blackberry since my phone is now at 20%. Any ideas on what to do before I take it to the store?