Hi, I’m using Airtel for the last coule of years. i’m currently in Delhi and honestly to say till now I don’t have much difficulties with the network. Everything is perfectly fine in my area regarding the usages( calls, texts, data) . And would like to suggest to use prepaid instead of postpaid as you’ll get the same facilities. Airtel now has lauched much more great offers for the prepaid. Even though i’m using prepaid, I top up on monthly basis like a postpaid and got much more better deals. So, people staying in delhi if anyone wants to go for Airtel, I would highly recommend. Just go for it, it’s worth it. trust me!