I bought this phone 5 months ago with lots of doubt. From 2008 I use only CDMA carrier so I always need a CDMA smartphone. After buying this phone I am fully satisfied with this phone. Some cons attach with this phone like "No OTG support" but perfect phone for all type of users are not possible. Battery backup of this phone is awesome. Both of sim slots support CDMA & GSM, 3G & 4G. But you can only use one 4G data at a time. Built quality is also very good. After using this phone I also buy for my mom and dad they also satisfied with this phone.