I am using a Telenor sim card from past 4 years. I bought it in july 2013 since ot was offering cheaper calling tariff at that time. Whenever I went to my village I was not able to make any calls because there was no network at all. When you buy a new sim of Telenor and recharge it, these people will send you a message that as you opt for some value added service some amount is deducted from you balance. It cost me around 200 rs. like this.
To stop deducting this amount you have to register on their do not desturb service. These people are robbing common man. Really pathetic. These people provide worst data speed in India.