Don't say I didn't remind you, when buying an iPhone, you must pay attention to the "three no touch" principle! For so many years, although domestic mobile phones have developed rapidly, signals, charging and other aspects have proved and surpassed the iPhone with strength, but Apple mobile phones have always been higher than domestic mobile phones in terms of software and hardware and smooth and durable quality. Since Huawei's 5G has been restricted, many consumers have turned their attention back to Apple, and even 4G old machines have become active again. In fact, regardless of the new machine or the old machine, 4G or 5G, the focus is to spend money on the blade, so that buying an iPhone does not suffer losses.

Principle 1: Storage below 128GB is not considered, the budget is enough, it is recommended that 256GB be up
First of all, let's not forget the helplessness of being forced to change the machine because of insufficient storage, Apple mobile phones only have the iPhone 13 series to upgrade to 128GB storage start, and others have 64 small storage versions. And 64GB has been confirmed by users not enough, downloading and upgrading the new system has become a problem, so the storage version of Apple's mobile phone below 128GB should not be considered anymore, no matter how cheap and attractive the price is, you have to endure. If the budget is enough, it is recommended to choose 256GB and above, so that it can be used longer to match the performance.
Principle two: cheap second-hand mobile phones can be chosen, but everything must go to formal channels
Secondly, the iPhone has also been relatively active in the second-hand market because of its smooth and durable and good quality. Second-hand phones often have obvious price advantages, the purchase is relatively cost-effective, cheap, and some of the appearance of the micro-flaws in fact do not affect the actual functional experience, which is indeed optional. But we must pay attention to the purchase through formal channels, otherwise in case of buying parallel goods, refurbished faulty machines, dirty machines, it is not only unsafe after-sales, but also may not be used, a lot of problems, in the end it is "lost to the lady and folded soldiers."
Principle three: consider the problem of system upgrade, too old models are not recommended to buy
Then, iPhone long-term after-sales is a major advantage feature, careful understanding of it also has a certain law, in general, the iOS system can almost provide four or five years of after-sales upgrades, which is almost the normal service life of Apple mobile phones. So if you consider the problem of system upgrades, too old iPhone models are certainly not recommended to buy, such as the iPhone 8 five years ago, iPhone X, four years ago iPhone XR, in fact, have come to the critical period, want to start after two or three years of insurance or try to avoid as well.
Strictly follow the above "three no touch" principle, in fact, you can exclude many old Apple models. Look at the current word-of-mouth and sales of iPhone models are relatively good, like the iPhone 13 and iPhone 13 Pro are the latest good products with 5G features, prices and all aspects of the functional experience; if you want a more affordable price and 5G, you can also give up the battery life experience to start the iPhone 12; if there is no need for 5G, you can also start with a comprehensive and balanced iPhone 11 that is priced at only three or four thousand. These are more prominent and representative, and the official has not yet been removed from the shelves, so it is safe to start with.
In short, there is no need to focus on hardware performance when buying Apple mobile phones, but to make more efforts from the details of high storage, supply, software after-sales, etc., so that the high price can be spent on the blade and truly achieve its longer service life, do you recognize it?