Jio sim is the most trending sim in india nowadays. this sim is for 4g phones .this sim company owner is mr.mukesh ambani ji who is the richest person of india. he provide us this reliance jio sim with best offers and best network in whole india nd the most amazing thing is that he give to all jio sim customer who are using 4g phone to them free unlimted data which is also 4g nd unlimted hd voice calling to all network in whole india so thats mean we can use unlimted data and voice calls to our freinds nd relatives without wasting money ta talk with them!