To pay your Airtel post-paid bill from your mobile phone: Step 1: Send SMS Mpay to 121. mChek will retrieve your outstanding bill amount from Airtel and you will receive a message, as follows: Pay: Airtel Rs. 250 Enter mChekPIN Step 2: Enter your mChekPIN to authorize the payment Step 3: Within a few seconds, you will receive a transaction receipt via SMS. Please note, to pay a specific amount against your Airtel bill, send SMS Mpay to 121. To pay your Airtel post-paid bill from the mChek website at www.mchek.com: Step 1: Click on “Click Here” in the Airtel Bill Pay / Recharge banner mChek will retrieve your outstanding bill amount from Airtel and you will receive a message, as follows: Step 2: Select “Pay PostPaid Bill”, enter your mobile number and click “Pay Now” button mChek will retrieve your outstanding bill amount from Airtel and you will receive a message, as follows: Pay: Airtel Rs. 250 Enter mChekPIN Step 3: Enter your mChekPIN to authorize the payment Step 4: Within