I have been using BSNL 3G from quite a long time. 3G speed is better than any other network provider. Also the plans are very cheap. As compared to jio which gives 1gb per day for 90 days at 309 BSNL 3G gives 3gb high speed data per day at 333 rupees.
This is budget friendly. Downlaoding speed reaches upto 1.8 mbps. And the speed is comparable to 4G.