I am using Airtel postpaid, before airtel I use idea and I am telling you Airtel has best network in Delhi, In my college lots of student facing problem of network just beacuse of too many wifi routers .
but I am using airtel I can call anyone with this netwrok so guys switch the netwrok. Airtel network is best even in undergournd metro:)
and I face any kind of problem I directly call the coustemer support help line no.
the excutive resolve my problem in very good manner. I think airtel is best in delhi swtiched your netwrk guys it will help you to active social and you can call your love once in underground too;)