According to reports, there is news that the four models of the iPhone 15 series will use the USB-C interface, of which the iPhone 15 series will support USB 4.0, with a bandwidth of up to 40GB/s, far exceeding USB 3.0 and USB 3.1.
But at present, most mobile phones still use USB 3.0 and USB 3.1 interfaces. Many people have asked: Can the USB 4.0 interface of the iPhone 15 really be ten times faster than USB 3.0?

Then, this article will discuss this issue from three aspects, namely the theoretical speed difference, the actual test results and the impact of user experience.

【Theoretical speed difference】

To understand the speed difference between USB 4.0 and 3.0, we first need to know their technical specifications and principles.

USB 4.0 is a new interface standard officially released in 2019. It is based on Thunderbolt 3 technology, supports bidirectional transmission and dynamic bandwidth allocation, and can achieve a transmission speed of up to 40Gbps (that is, 4 billion bits per second).

USB 3.0 is an interface standard released in 2008. It uses 8b/10b signal encoding, supports one-way transmission and fixed bandwidth allocation, and can achieve a transmission speed of up to 5Gbps (that is, 500 million bits per second).

It can be seen from the theoretical data that USB 4.0 is indeed ten times faster than 3.0 in theory, mainly due to the introduction of Thunderbolt 3 technology.

What about the actual transmission effect? We also tested both interfaces.

[Results of the actual test]

Although USB 4.0 is theoretically ten times faster than 3.0, in practice the gap between the two is not that great and is affected by many factors.

【Impact on user experience】

So, for the average user, what are the advantages and disadvantages of USB 4.0 for user experience? We analyze from the following aspects:

1. It is faster and more convenient to transfer large files. If the user needs to frequently transfer a large number or large-capacity files, such as video, music, games, etc., then using the USB 4.0 interface can save a lot of time and effort.
For example, transferring a 100GB folder took just 41 seconds in our tests, compared to 242 seconds using USB 3.0. Requires more power and more expensive equipment. Due to the higher transfer speed and power output capability (up to 100W) of the USB 4.0 interface, it also requires more power supply and cooling.

2. This means that the user may need to use a larger capacity or higher quality battery or charger to ensure the normal operation of the device. In addition, because the USB 4.0 interface is not popular enough, there are relatively few devices and accessories that support it in the market and the prices are relatively high. Choose to use according to different scenarios and needs. For users in different scenarios and needs, the USB 4.0 interface may have varying degrees of impact.

For example, in daily use, if the user only needs to perform some simple or small-scale data transmission or charging operations, then using USB 3.0 or lower versions is sufficient, and does not need to spend more money or resources to obtain or use USB 4.0 interface.

3. In work or entertainment, if users need to perform some efficient or large-scale data transmission or charging operations, then using the USB 4.0 interface can bring a better or faster experience, and it is worth investing or trying. For example, in daily use, if the user only needs to perform some simple or small-scale data transmission or charging operations, then using USB 3.0 or lower versions is sufficient, and does not need to spend more money or resources to obtain or use USB 4.0 interface.

3. In work or entertainment, if users need to perform some efficient or large-scale data transmission or charging operations, then using the USB 4.0 interface can bring a better or faster experience, and it is worth investing or trying.

In any case, we have been providing cost-effective accessories for mobile phones to our domestic and foreign customers

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