Airtel earlier today sent out notification via SMS to everyone who expressed their interest in buying Apple’s iPhone 4. India’s leading telecom operator with over 220 million customers has announced a “grand launch tonight at 12am, DLF Promenade mall courtyard, Vasant Kunj.”

iPhone 4 is available for both postpaid and prepaid customers in white or black color models in 16GB and 32GB variations. 16GB version is priced at Rs. 34,500 and 32GB is priced at Rs. 40,900.

We recently reported on Aircel’s tariff plans for Apple’s smartphone and now Airtel has also announced it’s bill plan options for iPhone customers.

It’s interesting to note that both, Aircel and Airtel are offering “reverse subsidy” by giving discounts on the monthly bill plan for a period of 24 months. Apple’s iPhone 4 will be sold unlocked by the operators and you could use the phone with any GSM operator offering micro SIM cards. The benefit of signing up with Airtel or Aircel is that you can enjoy monthly discounts.

According to various reports and rumors we have reported in the past it is widely believed that iPhone 5 will be unveiled in September. Apple has delayed the launch of the fourth gen device by almost a year and this could possibly lead to lack of interest in the current model.

Have you been waiting for iPhone 4 to be available in India? Are you going to buy one? Let us know your thoughts in the comments section.