I have an Evo Shift and I'm having problems with it. Whenever I slide the keyboard out to use it, my screen locks up. I usually have to take my battery out to fix the problem, but whenever I do this the ear piece stops working and I have to use the speaker phone. Sometimes the ear piece starts working after a couple of days, but it's been over a month since it's worked. I don't live close to a repair center and was wondering if there was anything I can do to get it working again.