Airtel delhi prepaid is gettin very costly in terms of special tariff vouchers.. 1000 min a2a @ rs 297 bt vodafone n idea same scheme fr rs149.vodafone n idea providing 300 sms free fr rs 35,no scheme in airtel.49 rs voucher provide calls to mobile @50 ps while other nw provide al local call @50 ps for 49..n many other scheme which airtel since2-3 years,also its nt d case tht airtel nw is superb,its sucks these days,no proper coverage in old delhi n noida.ALso rechargin these days is headache,servers r mostly down n physical cards r present as u cn recharge at ny odd hours..