Aircel has very very poor signal strength. whenever you go somewhere inside a building, it bacomes not rachable. no one can contact me then. though it has very good top ups and offers. what can I do with offers if I dont have signal? It is very irritating. when I m in contact with other person. one cannot hear other clearly. other network providers are not as bad as this one. if it improves it will be the best network provider in india. otherwise. this is worst.