Xiaomi Redmi Note 4 5.5-inch FullHD IPS screen Fingerprint sensor - Touch ID Memory: 4GB RAM 64bit MediaTek MT6797 Helio X20, Deca-core, 2.1GHz Internal memory: 64GB (expandable by up to 128 GB via microSD memory card) Cameras: 13MP rear camera (PDAF, f/2.0) / 5MP front camera (f/2.0) 4100mAh Battery Dual 4G LTE / 3G WCDMA / 2G GSM