I had previously written about vpower offer from virgin mobile. There are some more cool offers from virgin mobile as well. You can send local messages to your freind on any network for free now.

Circle Free Local SMS count Tariff Validity Recharge MRP
Rajasthan 500 30days 39
UPE 500 30days 39
UPW 500 30days 39
Karnataka 500 30days 39
Gujarat 500 30days 39
MP 500 30days 39
Kerala 500 30days 39
Mumbai 600 30days 39
Maharashtra 600 30days 39
Bihar 600 30days 39
Orissa 600 30days 39
AP 750 30days 39
Delhi 750 30days 39
WB 750 30days 39
Kolkatta 750 30days 39
Punjab 750 30days 40
TN/CN 1000 30days 29

However the offer is not valid if you use it while on roaming. Source

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