Pixel peeping

I'm thinking that the time has come to upgrade my phone (the Samsung is 5 years old and the iPhone is a 6, which cannot run the current version of iOS, nor the NHS Covid app).Camera performance is probably the most important factor, and actually I don't use a phone as a phone very often. So I'm spending a lot of time studying specs and tests, and I've also been doing some tests on my phone for comparison.