I just bought this phone to replace my iphone 4. It is really very good. The screen is superb, very good ergonomics. It was easy to move from iOS to Android. Some tutorials on the net explains very bine. Autonomy is not explosive if everything is on but we take a day without problem. The best is to install power toogle and place shortcuts to turn off unnecessary functions. It captures very well the wifi and bluetooth and I use it as a modem. While the iPhone buggait regularly, with the bike I always g network. Top Mobility. The big problem is the update 4.4.2 KitKat. There is a recurring problem with the bluetooth speakers. The phone does not control the volume, which is set to maximum. On my 3 speakers, exhibits this problem. It is not death, but it is the little less.