I am stying in Mumbai. and now a days Airtel is creating too much problem with network. in its advertising it says best network but let me tell you its worst network. I started using airtel long time ago in it was going good but since 2 months the network is performing really poor.outgoing calls call it dosent get connected at once and its 4g service also sucks. not even working like 2g and the problem is not just with me its with my friends as well who are using airtel network. I transferred my network to Vodafone. and will suggest you not to buy Airtel network at least in Mumbai thank you.