Check Main Balance and the validity of all network operators. Prepaid Sim Card Balance checking codes of Airtel, Vodafone, BSNL, Reliance, Aircel, Tata Docomo, Uninor and Idea. Internet settings for all network operators. Free internet hacking tips and GPRS settings. 2G/ 3G Internet Data Balance and validity. USSD Codes for all Indian Operators/ Networks.