Very important: Dont buy any data card before getting a demo done at your place either by sevice or by yourself.
I live in HAL where private isp are not allowed. So I opted for wireless mts, reliance tata doc, idea but airtel has THE BEST speed. I only get one bar in 4g network signal but it hits around 10 mbps when using torrent and idm, download is awesome even though browsing is little lagging. Its far better than mts in terms of speed but fup is upto 10 gb for 1000rs.