I am using TATA Photon+ from 15-12-2009. I used it for 3 months. I have 1800 min plan for Rs.500.
Speed
I have not got high speed regularly. I some day speed is good, some day poor. I got aprox 2.4 Mbps for 20 days and 1.3 Mbps for 10 days in a month. speed is nothing differ in day and night. means in which day have 1.3 Mbps day and night have same 1.3 Mbps speed. and in which day have 2.4 Mbps day and night have same 2.4 Mbps speed.
Coverage
Coverage is vary good. live in Howrah(West Bengal). I used it in howrah, hoogly. Every where I got HISA signals and 97-100% signal strength on first floor, 75-86% signal strength on ground floor.