As my phone was dead I was using my brothers phone.he used airtel sim.n wat the worst nightmare I face while using dis sim.it says it has 4g even in himalayas n mountains.but it doesnt even provide 2g network in my home.n in my college.dey are fooling people just high advertisment n service is very poor.even wen compalint to customare care dey also didnt do anything.a worst network ever