Reliance Jio is really awesome because they even not take single penny to get welcome offer. JIO app also it is also amazing it contain all features like call, video call, live tv etc., it is not bad for network coverage maximum they are trying to cover entire india.Customer service pretty good 24 hr will be respond with us.regarding charges and billing until now they not even charged single penny. after completion of welcome offer they may take less charges and billing.