Internet

WIKIPEDIA

https://en.wikipedia.org/wiki/Internet_in_Thailand

https://en.wikipedia.org/wiki/Telecommunications_in_Thailand

Mobile network coverage

https://www.nperf.com/en/map/TH/-/-/signal/?

Mobile network providers

https://www.ais.co.th/en/index.html

http://truemoveh.truecorp.co.th/?ln=en

https://www.dtac.co.th/en/prepaid/products/tourist-sim.html