Recently Reliance has launched MyStore service that offers cheap internet, calling and SMS packs to Reliance GSM prepaid customers.
MyStore USSD Service
Dial *129# from your Reliance number and choose option "1. Rs.9 Store"
These offers are valid only for only 1 day and costs Rs.9.
Offer 1 1 GB 2G data and unlimited Facebook, Twitter and WhatsApp
Offer 2 100 MB 3G data and unlimited Facebook, Twitter and WhatsApp usag
Offer 3 22 local minutes calling to any network
Offer 4 22 STD minutes calling to any network
Offer 5 unlimited local Reliance to Reliance calling
Offer 6 100 local and national SMS for 1 day at Rs.9

Dial *129# from your Reliance number and choose option "1. Rs.9 Store"

These offers are valid only for only 1 day and costs Rs.9.
Offer 1 1 GB 2G data and unlimited Facebook, Twitter and WhatsApp
Offer 2 100 MB 3G data and unlimited Facebook, Twitter and WhatsApp usag
Offer 3 22 local minutes calling to any network
Offer 4 22 STD minutes calling to any network
Offer 5 unlimited local Reliance to Reliance calling
Offer 6 100 local and national SMS for 1 day at Rs.9