I've been curious about other providers than True. I have been using True for many years. It works but speed dropps dramatically the further you get from Thailand. Sometimes using a vpn in some neighboring country (i.e. Singapore) makes the speed better for just about anything, I'm not talking about latency, that would of course increase by distance, but streaming speed. I tried vpn on vpn, example using a vpn in Singapore connecting to a vpn in the USA to watch some show, but apparently most vpn services does not allow this because security concerns.
Anyway, I have True home network with the whole package, TV, internet with fiber, a couple of phone numbers, 5G. It works but never lives up to the promised internet speeds when surfing outside Thailand. 5G is working ok, but sometimes randomly shuts down for a minute or so during the day.