UPeSIMWrite a review
UPeSIM is a French eSIM provider that offers mobile internet for more than 90 countries. UPeSIM has signed agreements with various mobile operators around the world and allows business travelers and tourists to stay connected abroad.
eSIM data plans for Thailand
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Downloading and activation is easy. It would be easier if you have another device that can display your email to read the QR code. It easily connects to DTAC in Thailand and Unitel (couldn't find Star Telecom) in Laos with LTE, but you need to set APN:emov for UNICOM HK, which is the roaming carrier, rather than the local carrier in each country. Also, you must select LTE manually (doesn't work with 3g) instead of automatically selected. Of course, don't forget to set LTE as priority in the sim settings. Getting started initially is quite difficult, but once you are connected, it is stable, fast, and comfortable.