What to do if the SIM card does not work in Vietnam?

If the SIM card does not work, first check the basic settings: make sure data transmission is enabled and restart the phone. If the problem persists, here are possible causes and solutions:

• Incorrect APN settings: they are usually set automatically, but if not, find them on the operator's website or in the app.
• Coverage issues: check if there is a signal in your area; in remote locations, connectivity may be weaker.
• Balance or tariff: ensure there are funds in the account and the tariff is active; try checking the balance via USSD code or app.
• If the card was purchased from a reseller, it may be blocked by the "owner" — in this case, you will have to buy a new one.

For complex cases, contact the operator's service center or use backup options, such as Wi-Fi in hotels.

You can learn more about this topic in our honest and reliable guide here - https://nashaplaneta.net/asia/vietnam/internet-i-mobilnaya-svyaz-vo-vietname

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