In order to increase convenience for customers, on the basis of recharging prepaid mobile subscriptions (VN-TOPUP). From July 27, 2010, Vietnam Export-Import Bank (Eximbank) launched a top-up service for postpaid subscribers of Mobifone and Viettel telecommunications networks.

Through this service, customers can make payments for postpaid subscribers through VN-TOPUP recharge.

Service details are as follows:

- Customers can top up to pay for postpaid subscribers of Viettel and Mobifone networks. Deposit amounts correspond to denominations from 10,000 VND to 500,000 VND. After depositing money, customers will have their debt written off directly on the telecommunications company system. In case the deposit amount is greater than the customer's freight debt, the difference will be deducted from the next payment period.
- The syntax and deposit denomination are similar VN-TOPUP service applies to prepaid subscribers.

Customers are entitled to discounts/discounts of VN-TOPUP services according to Eximbank's current regulations in each period.