Why many mobile phones don t support expansion cards now

The first is malicious programs, which can be used to prevent malicious programs from invading the phone without being verified by the AppStore. Abandoning the external expansion card is also equivalent to clearing a security risk, which should be something that many manufacturers are happy to see.

Second, the quality of many memory cards on the market is uneven, mobile phone manufacturers directly provide the best memory cards compatible with mobile phones, in the long run, the advantages outweigh the disadvantages, it should be noted that the benefits of this not only reduce the user's choice cost, but also have a significant change in the operation speed experience of the mobile phone.

The last point, and the most important, is that the capacity is an important parameter for the distinction of mobile phones, the price of ordinary G memory cards on the market generally ranges from tens to more than 100, and the 16G and 32G versions provided by mobile phone manufacturers are often ** 200 to 300 differences, and Apple is close to 1,000 yuan, from this point of view, this is why many mobile phone manufacturers follow the trend Apple has removed the SD card expansion function.

In fact, it's just for the money, an SD card 32G of 50 can't be used, but your mobile phone storage capacity of 16-32G has to add at least 200.

In order to sell large-capacity ROM machines, in addition, for flagship machines, ROM speed is faster, the quality of SD cards is uneven, and local tyrants are not bad for money is also an important factor.

At present, many flagship phones do not support expansion cards, but some flagship phones still retain the tradition of supporting expansion.

For example, the newly released Samsung Galaxy S9 and S9+ still support expansion cards up to 400GB. Last year, Huawei's flagship Mate 10 Pro did not support expansion cards, while the Huawei Mate 10 of the same series supported expansion cards up to 256GB. Similarly, the Mi Mi MIX 2 does not support expansion cards, and the Mi 6 does not support expansion cards either.

Mobile phones no longer support expansion cards, mainly related to the following aspects:

First, user experience.

With the application of UFS flash memory, the read and write speed of the built-in flash memory of mobile phones is getting faster and faster, which has completely opened up the gap with the read and write speed of external expansion cards. In the era of feature phones and the early stage of smartphone development, the speed difference between memory cards and mobile phones' built-in storage was not so large, so mobile phone manufacturers offered extensions, and users were happy to accept them, and they could get more storage space at a lower cost.

But when the speed of the built-in storage of the mobile phone is getting faster and faster, the speed of the external expansion card will drag down, and you will find that the reading and writing speed of storing things in the expansion card will be very slow, which will cause the experience of a mobile phone to be fragmented, which is what mobile phone manufacturers do not want to see. So, it was simply canceled and it could also make some space inside the phone.

In addition, most of the current flagship phones start with 64GB storage, which is enough for most users, and there is no need to use an expansion card.

Second, mobile phone design.

At present, many flagship phones have an integrated body design, and the back cover cannot be removed, and the battery cannot be replaced. It also has the advantage of making the appearance of the mobile phone more consistent, and at the same time, it can be designed to be thinner and more beautiful. One more expansion slot, for the inside of a mobile phone where every inch of land is expensive, is really a bit of a luxury, and many mobile phone manufacturers choose to cut it directly to make room for other components.

Third, the interests of manufacturers.

It is undeniable that some users still favor expansion cards, and they can get double the storage space at a very low **, even if they sacrifice some user experience, it is worth it. If expansion cards are supported, these users will choose the lowest storage version and then use the expansion card to get the storage space they want. But manufacturers obviously don't want users to do this, because often the price difference between the 128GB version and the 64GB version of the phone is far more than the cost price of 128GB and 64GB flash memory, and mobile phone manufacturers want users to buy a larger storage version and make more profits.

Of course, more and more mobile phones no longer support expansion cards are not caused by one of the above reasons, but by a combination of reasons. From the perspective of the general trend, mobile phones will become more and more integrated, and the function of supporting expansion cards may be completely eliminated in the near future.

The times are developing faster and faster, science and technology are not far behind, the current level of science and technology can be said to have exceeded history, the products around us are almost the crystallization of science and technology, in daily life, we carry the highest technology content of the mobile phone, now the mobile phone you will find that the current mobile phone is almost all integrated body, the back cover can not be opened for loading and unloading the battery, the memory card we were accustomed to before is now becoming more and more rare, Nowadays, almost all mobile phones produced nowadays do not support the function of expanding the memory card.

Why do all mobile phones stop supporting extended memory cards overnight? When it comes to the first mobile phone brand that does not support extended memory cards, it is Apple, so let's take Apple mobile phones to explain why current mobile phones do not support extended memory cards. We all know that the integrated mobile phone looks more beautiful than the mobile phone that can be disassembled, because the mobile phone shell cannot be opened, so the mobile phone manufacturer has also reduced the unnecessary damage caused by the frequent opening and closing of the back cover, making the iPhone series more durable; Nowadays, almost all mobile phones are waterproof in life, so the opening of the mobile phone is very particular, if the back cover is not removable, then if you want to support the memory card, then it is bound to be slotted on the side, not to mention the slot, even if the headphone jack is so small, the current iphone is not directly opened; Another important reason is that there are only 64G versions and 256G versions of iPhone, and the difference between the two is more than 100G**A difference of several thousand.

Dollars,This is a huge profit,Users either choose the cheap 64G version to worry about insufficient memory,If you want to choose a cooler 256G iPhone, then it's more than 2000 yuan to buy,A 128G memory card on the market is about 220 yuan**,Of which nearly 1500 yuan of profit is inside,If the iPhone supports expanding memory cards,Profits will be reduced,For a foreign company, making money is the most important thing, No matter what the topic of conscience cost performance or so on. Now many domestic mobile phones are slowly not supporting extended memory cards, and now many domestic mobile phone manufacturers are exemplifying Apple, and it is also removed if the iPhone does not have it, including expanding the memory card.

The quality of memory cards is uneven, often broken, and even the best memory cards do not run fast as the memory of the motherboard, and Apple is not just to make money (some people say that you can make more money by canceling the memory card), but to improve the satisfaction of the user experience.

There is also the assembly problem of assembly, if there is no memory card, there is no need to install the card slot, open the card slot, and the follow-up test of the card slot of the memory card is qualified, no memory card yield will be improved, the industry pays attention to efficiency, yield, if you can improve the yield and improve user satisfaction, why don't they do it.

Multiple reasons:

1.Adding an SD card slot will occupy the fuselage, and manufacturers prefer to use this part of the space elsewhere2Many SD cards cannot reach the reading speed of the built-in storage of the mobile phone, which affects the experience of using the mobile phone, so cancel 3

There are many reasons why manufacturers don't support memory expansion, such as low-quality memory cards slowing down the system, installing memory cards that consume too much power, and so on. In fact, they are all fooling people, in the final analysis, it is to make money.

Why hasn't the iPhone used an expansion card until now? When you are using an iPhone now, you will find that the iPhone does not have an expansion card. What is the reason why Apple's mobile phone does not use the expansion card, you must know that the use of the expansion card can improve the capacity of the mobile phone, and in the case of insufficient capacity of our mobile phone, it can improve the fluency of the mobile phone and enhance the space for storing data on the mobile phone.

Since the expansion card has so many advantages, why is the Apple mobile phone unwilling to put the permission of the expansion card? Can't the iPhone do such a simple thing?

Actually, if you really think about it. You'll find that Apple Afan phones don't use expansion cards for a variety of reasons.

The first reason is because the Apple phone itself is an iOS system, which is a closed system in our opinion, and if this system is used through an expansion card, it may cause Apple's own security problems to be affected, and the closure has also opened a gap.

The second reason is because of the "exclusivity" of the Apple mobile phone itself! For the Apple mobile phone, if you use an external expansion card, it may affect the fluency of the Apple mobile phone itself, affect the transmission of mobile phone data, you must know that the speed of reading and writing data of the expansion card itself is different, some expansion cards are relatively fast, and some expansion cards are relatively slow, and for Apple mobile phones, if different expansion cards are used, it will affect the smooth experience of the Apple mobile phone itself.

If some users use other expansion cards with relatively slow read speed, it will affect the use of the Apple phone itself.

The third reason, in our opinion, is because Apple does not want to blindly follow. For the Apple phone, it does not want to have such a function like an Android phone, it has to have its own uniqueness. And if the Apple phone also has an expansion card, then is it still called an Apple phone?

The last reason, and in my opinion, the main reason, is to make a profit. The iPhone without an expansion card may make more profits, because the user can choose a larger memory, if the phone is not enough memory, it will affect the smoothness of the phone, then this allows the user to change the phone.

And if there is a memory card, then the mobile phone user may change the memory card instead of replacing the phone, which may have a certain impact on the profit of Apple's mobile phone.

Generally speaking, there are several factors that cause a mobile phone, especially an Apple mobile phone, among which the memory factor is one of the most important factors, and the mobile phone is stuck due to too much data! Therefore, for Apple mobile phones, if the mobile phone memory is insufficient, it will definitely affect the normal use of the Apple mobile phone, so the mobile phone does not have a memory card, which is a good thing for the Apple mobile phone.