Questions are asked everyday about getting a SIM card for Thailand. Where to get, what the best operator is and price etc.
Esims are now a very popular option available on most modern phones, or indeed the only option for the new iPhones from the US.
There’s loads of companies out there offering you special deals. Pick one that suits the time and data requirements you may need and order it. Generally they send you an email with a QR code to install it for ease of use. You’ll need two devices, a printer or a friend to help as currently there is no way to scan a QR code from the email to install the sim without using your camera to scan it (or if someone knows an alternative way please advise).
Where the Esims have a major advantage is if they are an “area” Esim like valid for the whole of SE Asia or even worldwide. This means if you are visiting 3 or so countries in that area you don’t need to mess about with buying physical sims for each country and keep swapping them around.
Currently a typical Esim for Thailand is marginally more expensive than their physical counterpart but I’m sure that will change over time. They’re just so convenient. Pre install and it’s ready the moment you touch down.
I’m not going to say one company’s product is better than the others. Google will give you the options to choose from.
The main advantage as I see it is there is no messing about with installing or swapping physical sims, if you are travelling to various countries you can buy one that works in all and you don’t have the danger of losing your original tiny little sim from your own country and all the hassle of replacing that if you did.