Hi friends I have using the jio sim is last 1month and they are very usefull but they are net is a not always working and the mobile tower is a not cilontinuous reach. The jio is a calling problems is a high I have 5 to 6 time try the calling they after reach the call and they are mostly call is a droped and the not internet speed is a properly 4g they are 2g and 3g speed is a. Continuous and the call is a always droped my . and the jio is a some time is a network is a not reach and net is a widely used the jio is a very though sim card in reguraly use because the calling problem is a high.