How to purchase SMS credits via Mpesa To purchase credits via Mpesa: Login into your account. On the main menu, click on buy credits then buy now. Click on the Mpesa payment option. On your phone: Go to your mpesa menu Click on Lipa na M-PESA Click on Buy Goods and Services Enter the till number: 573746 Enter the desired amount Input your PIN and confirm the transaction Input the transaction code as illustrated below and click on add credit. A summary of all transactions will be displayed.