Jio is one of the largest network in india in short period of time and the sim should not give for 3g mobiles and ordinary mobiles this is one of the major defect and the voice should be breaked while talking in mobile and other hand it should unlimited calls and unlimited internet given to the user of jio this one of the advantage and its signal strength is very poor jio 4g sim only useful for 4g mobiles not for the 3g mobiles so please do not take this sum because the has been over and now taking prime membership is not good