You can upgrade your account easily with all major telephone carriers in Kenya. To pay with Airtel money:
> Dial *222#
> Choose Lipa Na Airtel.
> Go to buy goods
> Select mpesa till.
> Enter the m-pesa till number - 93 55 465
> Enter the upgrade amount
> Type in your pin
You will receive a message confirming the payment. Go to the upgrading page to finish the process.
