[Nerada]

I stopped buying anything Samsung for essentially the same reason. I was overseas and my S7 switched off and wouldn't turn back on. I walked into the flagship store and was immediately turned away because I didn't purchase it in that country.

[taosx]

I had a different experience, I bought a S21U overseas. While in UK the screen wouldn't turn on while the phone was on. I went to Samsung KX in London and a day later I had my S21 with a new screen and battery for no cost.

[cjk2]

I think it's worth comparing to Apple here. I bought an iPhone from Amazon in UK and the screen developed a defect. Walked into an Apple Store after 19 months, without AppleCare and they gave me a new phone and migrated all the stuff over for me right there and then.

Not sure if they're that good now but I sure hope they are.