When traveling in Asia we use Airalo eSim in our mobile phones. It acts like a 2nd sim card that will connect with local networks. This has worked great in Thailand and Cambodia.

No need to go to shops and get a Sim card. Internet working as soon as you land no fuss. Fast cheap 4G and 5G

Have working fast internet as soon as you land and easily extend online without needing to find top up stores and be overcharged. 

Check it out here: https://tp.st/u0OOvyZV