Hi friends, you must read my review to know every minute detail of jio 4g sim. I got my gio sim a week ago. for getting it I made a lot of efforts but finally I got. my sim got activated the same day I got it. now talk about its internet and other unlimited facilities. gyz internet is very fast and is running very smoothly you can also watch ultra hd videos online without facing buffer but if you are thinking that data is unlimited than you are wrong actually everyday you get only 4gb of 4g data after you consume that 4gb of data it will start giving speed of 2g so dont need to worry next day you will again get 4gb.internet speed is very good. now something about networks calls and SMSs. calling facility is not so good.many a times calls do not connect and call drop is very high. you cant place international calls only std and local you can. SMSs are also not unlimited, you can only place 100 messages per day but calls are unlimited. I hope my review helped you if anything missed than you can comment I will give answer surely