I am using tata docomo number from last 6 years & having no issues at all for pricing, 3G networks & best offers.Tata docomo is providing 1 GB 3G Internet in just Rs.125 no telecom operator can provide 3 G data in these prices.
Like as vodafone, Airtel I had never felt any issue with Tata docomo ever. Recently bought a new number in which I will get 3G Data for 3 Months in Rs.46 only. Good speed internet with lesser prices. I really love docomo for its offers & services.