I use capitel Modem and Micromax modem , capitel modem i got it from BSNL during connection purchase
both modems doesnt support voice call and i have never checked my balance as i get frequent messages about my usage , validity and balance
i remember paying Rs 350 for activation and Rs 1100 for data card , upon activation i started recharging for UL 750 plan
i keep positive balance for the monthly rent deduction
u are having a peculiar problem which i never faced , never my balance got deducted
if the balance is below Rs750 during the monthly rent deduction , my connection doesnt work and when i do a topup
it gets deducted and connection will work
and its no where mentioned in their website that new EVDO user will get UL plan for Rs350 for the first month
if u have seen it , post a screenshot