6. ASUS ZenFone 2: World’s first 4GB RAM device

We guess no one can forget this famous flagship of ASUS. Its 4GB RAM version comes with 128GB of ROM, a 2.3GHz Intel Atom Z3580 quad-core processor, 4GB of RAM, and a 5.5-inch Full HD screen. In terms of photography, you can use its 13MP primary or 5MP selfie cam to take pictures. Other useful ASUS ZenFone 2 specs are 4G LTE network, a dual SIM, ASUS ZenUI based on Android 5.0 Lollipop OS (upgraded to Marshmallow soon), and a 3,000mAh batt supporting fast charging tech.

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