How to top up the phone balance in Vietnam?
Come to Winmart and show the phrase "Viettel top up balance" on your phone in the translator, state the amount, and you will receive a receipt with a code.
Then activate it from your phone using *100*long code from the receipt.
P.s. you can also ask the cashier to activate it for you right at the checkout.
Or at the office for the tariff you need, the addresses are available on Google Maps.
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