What Coldbreeze16 said is totally right. I too use MMX 300C and I've experimented too much on EVDO. My area is a bit far away from BSNL exchange. So, getting good speed is kind of nightmare. What I've noticed about EVDO is that it's highly unstable, means, you can't use it on laptop comfortably. If you put your hand in front of modem, speed drops. Seeing all this, I bought a USB extension cable and fixed the modem at a place where speed was maximum. Yes, EVDO is highly directional, you move it 1 cm and change the direction of modem and you might get triple fold increase in speed. This is the best way to use BSNL EVDO at it's maximum capacity.