Micromax has launched its first portable Mi-Fi router that can convert 3G data connection into a Wi-Fi hotspot. The Speedster MMX400R gives downlink speeds of up to 7.2 Mbps (dependent on the network capabilities) and has a 1500 mAh battery, which the company claims is enough juice to run this nifty device for 4 hours or up to 20 hours in standby mode. It can hook up to five users over Wi-Fi and one additional user over USB. The company is yet to announce its price.UPDATE: The Speedster MMX400R is priced at R...