The ZenFone 2 ( ZE551ML) has a 13 megapixel rear ( primary) camera, which will produce high quality photos. Its 5 megapixel front camera makes it a good selfie phone. It can capture 1080p high definition video with its primary camera, which is second only to 4K in terms of recording quality.The phone runs on the Android operating system, which is currently the most popular platform on the market. Given that the phone is only a year old, it should be able to run the most recent apps and software just fine. ZenUI, by Asus, runs on top of Android on this device, offering a customized experience.