Install your Thailand eSIM at home, before you fly
- At home, on Wi-Fi
- Within 30 days
- Keep the line off
The short answer
Do the install at home on Wi-Fi, before you fly, within 30 days of buying it. Scan the QR code from your order page, give the line a name, and leave it off until you land. Once the eSIM is added, keep it: a QR code is usually good for a single install.
Checked October 2, 2026
Before you scan
The phone has to support eSIM and be unlocked; the phone check shows how to confirm both. Get on Wi-Fi first: the eSIM comes over the internet, so pick a steady connection, at home if you can.
Scan the QR code
View your order page on a second screen, or print the code out. The code appears on screen right after payment and stays on that page, so keep the link. iPhone: open Settings, tap Cellular and Add eSIM, then scan. Android: open the SIM settings and add an eSIM (Connections, then SIM manager on Samsung; Network & internet, then SIMs on Pixel). When the camera refuses the code, type the details in by hand from the order page.
After it is added
Give the line a name you will recognise, such as Thailand. Leave it off until you land, and never delete it: a QR code is usually good for a single install. On landing, follow switch it on after landing.
If it fails (Install the eSIM)
When the code will not scan or the install stalls, stay on Wi-Fi and give it one more try. If it stalls again, send the store’s support your order page link and your phone model before a further attempt.
Questions
How to install eSIM on Android?
Go to the SIM settings, add an eSIM and scan the order page's QR code: on Samsung that is Connections, then SIM manager; on Pixel, Network & internet, then SIMs. When the camera will not scan, type the details in by hand.
More help
Switch your Thailand eSIM on when you land
After landing in Thailand, 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 Thailand eSIM: when you need it
The eSIM runs on a Thai network, and the store says switch data roaming on for the eSIM line only when it does not connect. Where the switch is.
Thailand eSIM not connecting: the checks, in order
Is your eSIM not working in Thailand? Check the line, mobile data and airplane mode, then data roaming, pick the network by hand, and write to support.
Thailand eSIM refunds: when you get your money back
When the eSIM does not work and we cannot fix it, the refund is full. A working eSIM is not refunded. How to ask, and where the money goes.
Can my phone take an eSIM? Check it before you buy
Dial *#06#: if your phone shows an EID, it has an eSIM. It must also be unlocked. Check your model before you buy a Thailand 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