A few weeks ago, when I took a taxi home from Suvarnabhumi airport, the taxi driver was on 2 phones at the same time. He used some kind of app to record and send voice messages and had to press the screen when he was speaking. Then the persons in the other ends would reply and the conversations would go on and on.
In my thousands of taxi rides in Thailand, not a single driver has met my expectations, that the driver should be polite, not be on the mobile phone, not listen to the radio or watch a movie and keep both hands at the steering wheel when driving with passengers.