Huawei Ascend P1 U9200: upgrading (International to Chinese)
i just installed the official firmware.(B315, Jellybean) If you don't use the radio and MHL capabilities it is worth it, as those are not on there. Makes the phone faster, improves the camera. Battery icon shows exact percentage battery remaining making it at least feel if it last longer, still won't last the entire day if gaming on it. The volume up takes a photo and feels more responsive.