I bought this last week from BB and I didn't do any mod yet. I turned it off (push the top right button and choose third option to power off) this morning but seeing it showing starting screen "HUAWEI S7" by itself this afternoon and just hung there(normally I will see turning circle after HUAWEI S7 screen if I turn on device). It doesn't response to anything like power off key and any other "home/menu/back" keys on device. I didn't find any reset hole with this device like other GPS devices. The last thing I can try is remove the battery but I read the posts and someone mentioned it may cause the issue. Leaving S7 in the hung screen will eventually drain all battery. Can someone offer advice please? Thanks.