Please follow these step:
Step 1. From screen "Account" -> choose "Fund-in"
Step 2. Choose Linked Bank , for example: Vietinbank
Step 3. Input amount
Step 4. Confirm information
Step 5. Input OTP from the bank sent
Step 6. Successful transaction
*) Note: For other linked bank accounts (BIDV, Vietcombank, Sacombank), agent will select the bank that linked and perform the fundin steps as above.