Recently Airtel Launched 4G services in Delhi/NCR with all other Metro cities. The Plan of Airtel 4G are same as 3G plan but the difference the Data speed. Online Videos run with buffering. Airtel 4G is best in Class. Moreover if you have Airtel 3G SIM than you can upgrade it with 4G Without any cost and deliver at your Door step.
You just have a valid Internet plan and enjoy the fastest speed of Internet on Mobile.