Vietnam eSIM not connecting: the checks, in order

Line on
Mobile data on the eSIM
Pick the network by hand

Illustration: a traveller on a Hanoi street holds a phone up toward a rooftop signal tower.

The short answer

Check four things in order: the eSIM line is on, it is chosen for mobile data, airplane mode has been switched off and on, and data roaming is on for the line if it does not connect. Then pick a network by hand. If it still fails, write to the store's support while you are in Vietnam.

Checked October 2, 2026

The checks

Start with the eSIM line: is it switched on? Second, it is chosen for mobile data. Third, airplane mode on for ten seconds and off again, or a phone restart. Fourth, when the data still will not start, switch data roaming on for the eSIM line.

Pick the network by hand

Inside the eSIM line’s settings, switch automatic selection off and walk the network list one entry at a time. Wait a minute on each one.

When the data runs out

If the data worked once and then quit, look at your order page: mobile data can slow or stop for the rest of the plan once its days or data run out.

Write to support

If nothing works, write to the store’s support while you are still in Vietnam, with your order page link, your phone model and screenshots of the mobile data settings. When no fix can make the eSIM work, the refund is full: see refunds.