hello,I have recently purhcased a Iball 3.5G usb modem. I was previously using a tata docomo 3g sim which would give me good speed(Download speed upto 1mb per sec).But now i have shifted to BSNL GPRS (Rs.98 plan) which is giving a very slow speeds of about 10kb . I have tried calling the customer care which off course is a very bad service and got an answer that "Speed is not Guarannted by BSNL" . My modem is showing full signal strength ,but it often fluctuates.Also when i recahrge my BSNL sim it gives me speed of abuot 100 kb,but after 1 day it resumes to 10kb. What is the problem......???????????Is there a modem problem ......??????Are there any cheap plans which can get me a speed of about 50kb.......?????