I’m using HTC Desire 830 Dual sim Version. It have 3 slots & not a 2 slots very Good sound Qualty very easy to use bast looking The htc Desire 830 is powered by 1.5GHz octa-core MediaTek Helio X10 processor and it comes with 3GB of RAM. The phone packs 32GB of internal storage that can be expanded up to 128GB via a microSD card Connectivity options include Wi-Fi, Bluetooth, FM, 3G and 4G Ibattery 2800mAh