Impressive feature phone with WhatsApp The Intex Nano 4 features a 1.8-inch TFT display with a resolution of 128 x 160 pixels and a pixel density of 114ppi. It is housed in a black coloured outfit which has a thickness of 14.5mm and a weight of 95g. The Intex Nano 4 is armed with a 0.3MP snapper at the back and packs a microSD slot which is expandable up to 32GB, which is massive. It also supports WhatsApp, the most popular social networking platform in the modern world. Fuelled by a 1,000mAh Li-ion battery, the Intex Nano 4 claims to deliver up to 9 hours of talktime and up to 300 hours of standby time in 2G networks. Connectivity options include GPRS, Bluetooth v2.1 and USB port.