Here r the steps:
1. First register here with ur email id. http://promotions.pennytel.com/xpromo/website_landing.html
Then Check ur mail for id and pasword.
2. Go to www.pennytel.com/m
3. Sign in with your id and pasword given in your mail. It wil show, "Balance : $0.00" But NO PROBLEM guys. Just enter "From" - which cell u want to make the CALLER. "To" - whom u want to accept the call here it comes.... . . . U r connecte via "call-back method". That's it. U can hv fun by making surprizes for any 2 person who may b ur frendz, relatives or anyone! But dont missuse it plz.. WORKIN IN ANY MOBILE, ANY NETWORK, NO ADDITIONAL SETTINGS