Hmm..If your highest priority is camera quality then Google pixel BUT as long as tensor is using Samsung foundry tensor g1 , g2 , g3.....the power efficiency will be horrible.

- you will experience extremely poor signal reception
- if you use mobile data with pixel it will heat up like crazy
- the heat will lead to horrible battery life
- also tensor performance is similar to exy-shit

Advice would be to have two phone, Google pixel for camera exclusive and another phone for other stuff

Can't vouch much for after sales but in Sarawak vivo and oppo if got any issue can fix on spot, no need hantar to Gardenia land fix.

2. OnePlus has buggy software and make sure to get OnePlus device that don't use Samsung OLED or else green line will come for you

3. Nothing phone , never tried before but from many impressions online I like their software , very optimized
Nothing phone has this hidden nothing text because it's from UK

4. Honor I not sure, never have any in-depth look on it.