I am Yogesh using airtel prepaid for more than five years. For past few months, I am receiving SMS from unknown numbers(56060,54321,etc) to download pictures,wallpapers,etc. Even though I ignore these type of messages I have been charged without downloading it. Eventhough I disabled service messages to avoid automatic connection of gprs.They send text messages like 'Dear subscriber click below link... to download rubbish things, I have...