where in the world do you get your information certainly not from any immigration officer? You should probably add to your comment that what you are saying is nothing official. It is only your opinion.
How could anyone possibly answer that question unless they have had experience with all of the major carriers. All the responses to your post are strictly based on personal opinion. My suggestion would be stick to the major players AIS, Dtack,(spelling?), True
I couldn’t agree with you more people so many people are hung up saying that the minute you come in to Thailand your visa is canceled and then you are on an extension of stay which is Ludacris because what if you don’t request an extension of stay, then in my eyes, you’re here legally on whatever type of visa you are holding
apply for a tourist visa, which will give you 60 days and you can get extend that for 30 more days. But you must apply in your home country and use the E Visa website for Thailand.