Redmi Note 4 out of stock within minutes after launch News, Technology Xiaomi Redmi Note 4 went on the first sale on Friday via Mi.com at 12:00 PM, and within few moments all of the versions of the handset has gone out-of-stock. Xiaomi has unveiled the Redmi Note 4 earlier this year in Gold, Grey, and Silver colour variants, with a new Matte Black colour variant coming soon. The Redmi Note 4 model was launched in China back in August 2016. The dual-SIM (Micro+Nano) Redmi Note 4 will run on MIUI 8 based on Android 6.0 Marshmallow, and come with a 5.5-inch full-HD (1080×1920 pixels) 2.5D curved glass display with a pixel density of 401ppi. Xiaomi Redmi Note 4 is powered by a deca-core MediaTek Helio X20 coupled with Mali-T880 MP4 GPU. The Xiaomi Redmi Note 4 has acquired a 13-megapixel rear camera with PDAF (phase detection autofocus), an f/2.0 aperture, and dual-tone LED flash. The 5-megapixel front camera of Xiaomi Redmi Note 4 has an 85-degree wide-angle lens. The smartphone supports expandable storage via microSD card (up to 128GB) in a hybrid dual-SIM card configuration. Apart from the fingerprint scanner, the Xiaomi Redmi Note 4 has also housed an infrared sensor. Connectivity options include GPRS/ EDGE, 3G, 4G with VoLTE, Bluetooth, GPS, Micro-USB, and Glonass. The Xiaomi Redmi Note 4 smartphone is powered by a 4100mAh battery, measures 151x76x8.35mm, and weighs 175 grams.