I just realised that while I was actually getting unlimited data for 600B on my AIS package last year, what I bought at the airport for 850B is in fact not unlimited, but rather limited GB after which you are cruising along at 400kb/s
Are there any really unlimited packages left in Thailand on prepaid? Dtac? True? Or is the 25Gb 6Mb/s package as good as it gets these days?
EDIT:
For those interested in coverage, here is a great tool. [[members only])
Seems like DTAC, True Move and AIS cover most of the country, but AIS has significantly better coverage of "4G+"
TLDR : Answer Summary
The user discusses their experiences with mobile data packages in Thailand, noting the confusion between unlimited and limited data plans. They inquire about the availability of truly unlimited prepaid packages and receive responses suggesting various options. Comments refer to Line Mobile, which offers unlimited data at a promotional price, and mention other services and packages available from AIS and Numobile that provide substantial data allowances.