My father is using bsnl from 10 years and he started using its 3G around 8 months ago; but results were very disappointing . Bsnl is the worst internet service provider ever and besides it they charges very much for the same plans as compared to other mobile operator companies . It provides slowest speed; they provides 1024mb daily but due to slowest speed you cann’t use more than 200mb( max) in a day. So I don’t only suggest you but request to you; live without internet but never use BSNL 3G.