Reliance is charging too much, specially for data packs. more over there are differenct packs for dongle and mobile. you cant switch the sim to mobile to dongle. if you do so, your data pack will became 0 immediately. network coverage is good only for cities.
Whenever they offer full talktime or more talktime, then their trained customer care executives are deduct the the extra amount by charging some VAS usage charges, without your knowledge.