Malaysia eSIM not connecting: the checks, in order
- Line on
- Mobile data on the eSIM
- Pick the network by hand

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 Malaysia.
Checked October 2, 2026
The checks
Start with the eSIM line itself: it has to be on. Second, it is chosen for mobile data. Third, give airplane mode ten seconds on, then off, or restart the phone. Fourth, if data still will not start, turn on data roaming for the eSIM line.
Pick the network by hand
Inside that line’s settings, switch off automatic selection, then work through the networks in the list, one at a time. Wait a minute on each one.
When the data runs out
When data worked and then quit, open your order page: after the plan’s days or data run out, the line may slow or stop until the plan is over.
Write to support
If nothing works, write to the store’s support while you are still in Malaysia, with your order page link, your phone model and screenshots of the mobile data settings. Orders, QR codes and refunds are handled by the store, and its support answers in English and Vietnamese. Where no fix makes the eSIM work, the refund is full: see refunds.
More help
Install your Malaysia eSIM at home, before you fly
Scan the QR code from your order page at home on Wi-Fi, within 30 days of buying, and keep the line off until you land. How to install a Malaysia eSIM.
Switch your Malaysia eSIM on when you land
After landing in Malaysia, switch the eSIM line on and choose it for mobile data. If data does not start, turn on data roaming for that line only.
Data roaming on a Malaysia eSIM: when you need it
The eSIM runs on a Malaysian network, and the store says switch data roaming on for the eSIM line only when it does not connect. Where the switch is.
Malaysia eSIM refunds: when you get your money back
A full refund if the eSIM does not work and we cannot fix it. A working eSIM is not refunded. How to ask, and where the money goes.
Will your phone take an eSIM? Check before buying
Dial *#06#: if your phone shows an EID, it has an eSIM. It must also be unlocked. Check your model before you buy a Malaysia eSIM.
Still stuck?
Orders, QR codes and refunds are handled by VietSIM support. Write with the link to your order page and your phone model.
contact@vietsim.com