new thing as Idea has introduced it long ago but India's
Major telecom Company Airtel strated this service few days
This is the sms which i received on my no.
"Now add 10 Rs. Balance to your Airtel prepaid account anytime, anywhere.
Just Send LOAN to 121 [ tollfree ]. This 10 Rs. + 1 rs processing fee will be
deduted after 48 hours from your account"
So if there is an emergency to get some Talktime then
dont penic just send LOAN to 121 :)