[tjpnz]

Last time I was in SE Asia it wasn't uncommon to see people carrying multiple SIM cards. They were sold cheap and providers were constantly undercutting each other on mobile data. This was almost a decade ago now, but given how Asian variants of phones still have dual SIM slots I'm guessing it's still common.

[smoovb]

Asian eSIMs are common now. For example the Thai travel sim you would get at the BKK airport can be purchased online as an eSIM - so you can skip that local queuing and currency exchange experience.

Discloser: I sell eSIMs.