Well I'll just start off with the one thing I hate the most about this phone. The camera. After a year's usage, the camera began to produce a purple grid every time I try to take photos in dark lighting. This ONE factor really ruins the phone. However, on the brighter side, this phone is one of my most favorite phones of all time. I have been using HTC products since 2009 and they have not failed me. The M7 is light, sleek and was one of the most revolutionary phones of its time. I love the fact that this phone is still getting updates 3 years later. How amazing is that? I know for sure Samsung doesn't do that, and Apple (lol...). The battery is definitely strong, but I did have to recalibrate it a couple of times. I use this phone with T-Mobile and it is unlocked and rooted. So far so good.