Or maybe Thai stores know to source the good brands from China? I'm curious to hear other's experiences with phones bought in each country. Here is mine:

 

1. First phone bought here at Tesco. Good. I dropped it and it broke

2. Vivo Y31L from Power Buy, 4,100 thb ($130 or so). Good. Eventually I ruined it by exposing it to water/sweat too often

3. Xgody from Aliexpress/China. $56 shipped. 16gb storage, 2gb ram. Very poor bluetooth, unusable in some circumstances. Phone itself didn't work as a handset either. 

4. Wiko brand phone, 2,100 thb or so from Big C. Good calls and bluetooth. Handles my needs. I think specs are lower, like 8gb internal 1gb ROM.

You confused, none you mentioned are thai brands. All chinese brands just sold in Thailand.

 

there are established Chinese brands and copycats, works accordingly

Thailand don't design and produce any local phone brand. They are either Korean or Chinese brands.

 

I bought a local Samsung TV and it gaved me quite a lot of problems after less than 3 months.