Under what circumstances can I change my iPhone?

1, there are non-human quality problems (for example, the mobile phone often crashes or cannot be turned on; The screen part is dark yellow; If there is no feedback on the button, you can change the machine.

2. After sale, the faulty parts will be replaced or an iPhone will be replaced according to the specific fault conditions, that is, you can choose to repair or replace it. Don't think it's better to change the machine, because Apple's after-sales regulations are to change the new machine within 15 days, and change the official machine after 15 days. In other words, the replaced mobile phone is also a mobile phone that has fixed the problem but passed the Apple test.