Do not bother calling or contacting Airtel. I wanted to find out how I could extend validity of my Airtel prepaid plan by one year. I got an email response stating I should do a Rs678 recharge. However, neither Airtel dealer nor the customer service people at the Airtel Relationship Centre could do such a recharge. I must have wasted at least 6 hours, all in vain, trying to accomplish such a simple task. Also had a very frustrating experience with Air India, trying to get the travel date changed. It seems all the services in India work on “take it or leave it” principle. This is the level of service when a customer wants to pay. God forbid, if you are trying to get a refund from them. One of the things that these companies can do, is to perform many of the services on their web sites. Of course, the web site needs to be up-to-date and be able to accept credit-card payments.