ViettelPay Pro is a free iPhone application developed by Viettel Corporation for its customers. It is designed to help Viettel agents and retailers perform transactions for customers quickly, safely, and easily anytime, anywhere.

The app offers several services, including payment of Viettel and non-Viettel telecommunication bills, selling of Viettel and non-Viettel pin codes, and conducting cash transactions such as money transfers, payments, and bank account top-ups for customers. ViettelPay Pro also allows customers to pay for utility bills like electricity, water, and installment payments. Additionally, the app provides a feature for sales channels to look up and report on their sales during the selling process.

Overall, ViettelPay Pro is a convenient and useful app for Viettel agents and retailers to facilitate transactions for their customers.