I am using jio sim about 1 years and my experience is so great. when I download the gta vice city the speed is over then 3 mbps and the game is download successfuly in 10 minutes or below.when I call any person through jio volte network the voice is in hd quality.and the coustmer care service is also helpful in any problem.i have not facing any problem with my jio sim.but some place the network is not good and downloading speed is very low in morning but the speed is fast in night. pack is also in budget.