
Originally Posted by
panchabhut
you are talking about two different technologies here.
EVDO = CDMA 3G version
provider - BSNL, MTS, RELIANCE, TATA INDICOM.
only MTS give OMH SIM that works on any modem. BSNL SIM works on select modems. REL and TATA gives locked modem without SIM
works on 800 mhz band - lower peak speed, higher average speed, higher speed indoors
HSDPA/WCDMA = GSM 3G
provider - BSNL GSM, REL GSM, TATA DOCOMO, AIRTEL, VODAPHONE, IDEA
SIM would work on any modem. but most pvt co. artificially locks modem.
works on 2100 mhz band - higher peak speed, lower average speed, lower speed indoors
so first check in your location which one of the above is giving service and the get demo to find out which one suits your requirement.