I have been using tata indicom since 2006 this was the best mobile operator ever their recharge were so cheap they used to give 165 RS in the recharge of 150 RS.
Network were also good I rarely had the network related problem Customer service was also very responsive they used to give solution very quick to any problem & the call rate was 25 paise per minute local std since 2011 I was very sad when I hear they are closing tata indicom this is the company who changed the india when there was no other service.