Question 1

How do I top up a Vietnam phone number from abroad?

Accepted Answer

Enter the Vietnam mobile number on WandrSIM, pick an amount, and pay in Bitcoin, USDT, ETH or another supported coin. Credit is delivered to the recipient's account within seconds.

Question 2

Which carriers in Vietnam are supported?

Accepted Answer

WandrSIM supports the main Vietnam prepaid carriers — Viettel, Vinaphone and MobiFone — and routes top-ups automatically based on the phone number prefix.

Question 3

Is the top-up instant?

Accepted Answer

Yes. Once payment clears, the recipient's balance is updated within seconds. You receive an email confirmation with the transaction ID.

Question 4

Are there fees on top of the amount?

Accepted Answer

The total at checkout is final. No hidden fees, no recurring charges. The exchange rate is locked in before you confirm.

Question 5

Can I send a recurring top-up?

Accepted Answer

Yes. Logged-in users can enable auto top-up to recharge any saved Vietnam number on a monthly schedule or when their data balance runs low.

Question 6

What currency is the Vietnam top-up priced in?

Accepted Answer

You pay in your card's local currency at the rate shown on checkout; the recipient receives the equivalent balance in VND (₫).