In the history of the iPhone, the highest resolution of the mobile phone must be the iPhone 13 Pro Max that has not been on the market for a long time, reaching 1284 * 2778, it looks like the data is OK, it is close to 2K, but in fact it still belongs to the category of 1080P.
Let's look at the recently more popular iPhone resolution, iPhone XR was very cost-effective that year, the resolution was 828 * 1792, and the iPhone 11 is the same screen, to the iPhone 12, the Pro Max series screen to maintain the same resolution, and the iPhone 12 and 13 resolution is also the same.
We are looking back at other domestic mobile phone manufacturers, 2K resolution can be said to be everywhere, and in the early years of mobile phones have been on the 2K screen, but Apple has been indifferent for so many years.
In fact, the most real reason is often very simple, that is, Apple is very concerned about energy consumption, 2K screen will certainly be better for the user's visual experience, but compared to 1080P, the sense of experience improvement is limited, assuming that it has increased by 1.2 times.
However, the performance of 2K in power consumption will be higher, compared to 1080P, the power consumption has increased by at least 1.5 times, so the overall experience is not good.
In order to pursue the ultimate user experience, Apple will consider it carefully in this regard and balance all aspects. This is also a comprehensive reason why the iPhone13 has a better battery life and a better reputation.