HTC desire 628 dual sim comes with 3GB of RAM. It have packs 32GB of internal storage that can be expanded up to GB via a microSD card. this phone is dual sim phone, sim socket is micro sim .The HTC Desire 628 Dual sim runs android and is powered by a 2200mAH non removable battery it measures 146.9070.9019.80( height* width* thicknes) and weight 142.00 grams. its music system is very soft and comfortable for our ear. front camera of phone 5 megapixel and back camera is 13 megapixel. and its have 1.3GHz octa-core processor, and its opertating system is android.