When we compare the Download speed between BSNL and Tata Docomo's 3G download speeds in Bangalore, definitely BSNL is way ahead in the download speed while Tata Docomo overtakes in the upload speed. Check out the test results below. Taken using www.speedtest.net android application.

BSNL Results:                                                     Tata Docomo Results:

Bsnl 3g speed Docomo 3g speed test1