Bsnl is Bhai soch na lena network. At which your mobile show range is full but voice problem net slow problems always comes in reality. In the big cities it may good network but in villages its range is very low also bsnl 3G becomes only 1G. Bsnl is not for hilly areas in that area idea and airtel is good. So if You are plan for summer vacation bsnl ko bhai soch na lena because range good but no voice. hahaha. And in old Bsnl numbers also Validity is big issue . In punjab you can take 6 month validity by giving 36 rupees.