Recently i bought a micromax datacard, because i have heard that its giving very speed with bsnl sim. Therefore i recharged my sim with rs 14 voucher to test. I got a very good speed 200kb dwnlding. Then i recharged with 270, the signal of 3g were there but i was getting only 15 to 20 kb dwnlding speed, and today it got worse i'm not even getting the damn 3g signals??? What is the problem?