Can someone help me? My Evo 4g shuts down two minutes into a phone call. When I try to reboot, it won't because the battery is dead even if the battery was at 100% when it shut down. So I have to plug to a charger then reboot and the battery is at 0%. But if I reboot the phone again while it's plugged, it will reboot to a 70% charge. I don't know what else to do. I feel like my phone is not wireless anymore. This only happens when on battery. I can be on a phone call for hours as long as i'm plugged. Do I need a new battery? This started when MIUI stopped development on the Evo 4g. Running MIUI v4 4.0.4 2.4.1 4/1/12 (swiper's build).