Hi, I found this mobile very very good. It has very good features especially the light around the backcamera of the phone makes it different from others.It is based on Android 5.1.1lolipop version operating system.the ram of samsung galaxy j2 2015 is 1GB but they in crased to 1.5GB. It’s good camera real camera 8MP auto focus LED flash and front camera 5MP and micro usb v.2.0. I got satisfied with the product