Billboards aren't seen up close, resolution requirements aren't that stringent.

Guess you didn't click the first link. It shows a hallway in a subway with several wall size photos an people walking directly next to them.

Yes, that's marketing. For people looking at something up close you need at least 300 dpi. They'll look ok-ish as long as people are distant enough to see the whole image.

Those are often done with external lenses, they're composites of multiple shots, and/or have had a ridiculous amount of post processing work done to look good.

And of course they're done with studio lighting. Huawei has been caught at least twice using DSLR shots as phone pictures as well. Samsung was caught once.

https://fstoppers.com/originals/can-you-really-claim-it-was-...

I guess if lighting is good, you put the phone on a tripod and manually set up the shot, you can capture these things. The amount of work involved ist staggering though, and the pocketability of the solutions and using stuff without an assistant... well - forget it.

I guess if lighting is good, you put the phone on a tripod and manually set up the shot, you can capture these things. The amount of work involved is staggering though, and the pocketability of the solutions and using stuff without an assistant... well - forget it.