You can ask for credit from your friends through one of the following options:
Download and install MyIrancell application. At the bottom of its main page, tap on “Recharge a Friend” section and then go to P2P Service. Here choose “Charge Me” option and then enter the mobile number and the desired top-up amount; then send your request to the related number.
Dial *555*1*3*3# or *142*3# then enter the desired top-up amount and the related number to ask for top-up. After you have sent the request, your friend will receive an SMS including your number, the requested top-up amount and the verification code, from 1115. To accept the request, they need to simply send the verification code to 1115.