It's been a full month and a half since the first beta version of iOS 15.4. Including the RC version of the previous two days, this official version has undergone a total of 6 tests, which can be said to have been polished for a long time.
The latest news on March 15th, iOS15.4 official version is finally fully pushed, and the fruit powder of the fast hand should have been upgraded, and the black cat is no exception.
The phone I'm using is the iPhone 13, which is currently the official version of iOS 15.3.1. I took a look before updating the system, and this time the OTA package was up to 1.28GB in size.
iOS 15.4 is undoubtedly a significant upgrade, supporting the "Mask Unlock" feature for the first time. As long as it is an iPhone 12 and iPhone 13 series of users, there is no reason not to upgrade.
Here is a brief introduction to the author's upgrade process, to give you a reference. iPhone 13 After upgrading iOS 15.4, a setting interface of "Wear a mask and use Face ID" appears on the opening opportunity.
You can select "Use Face ID when wearing a mask" or "Don't use Face ID when wearing a mask."
It should be noted that if you are still wearing glasses, then you must wear glasses specifically, enter the face ID again, and let the system remember the characteristics of the glasses to improve the accuracy of mask recognition.
However, I found that "glasses recognition" is not very sensitive, and it cannot be recognized after the first entry of glasses, and the second entry is successful.
It can be seen that compared with the normal state, the accuracy rate of "mask unlocking" must be slightly reduced - after all, the collected face information is less than half. However, Apple also attaches great importance to security, and has exhausted all means to ensure the accuracy of mask unlocking.
The black cat is also a nearsighted user, and I deliberately put on a mask and glasses for face recognition, and experienced the speed at which the mask is unlocked. I distinctly felt that the "mask unlock" was about 0.2 seconds slower than normal, barely within the acceptable range.
Next, I recognized five or six times in a row, tried various angles, and as long as I was facing the phone, the recognition process was quite smooth. Moreover, even if you only open one eye, you can recognize success.
At the same time, "mask unlock" and "normal unlock" are the same level, there is no distinction between high and low, even in the payment level scene can be used. For example, when downloading an app at the AppStore, wearing a mask and using a Face ID can also take effect.
After experiencing it for so long, it is time to unlock the mask of iOS 15.4 to draw a conclusion: as long as you follow Apple's instructions to complete each step, wear a mask to unlock the phone, and there is basically no difference from the normal state, the speed is only 0.2 seconds.
However, after the official update of iOS 15.4, the old users of iPhone 11 were silent - the same full-screen model, iPhone 11 users also need this function.
On this issue, I also went to consult a lot of information, and finally found the problem. First of all, the Face ID of the iPhone 12 and iPhone 13 has been upgraded.
And the NPU of A13 has only 8 cores, and the computing power is 6TOPs. The NPU of A14 and A15 has 16 cores, and the computing power is 11TOPs and 15.8TOPs, respectively. It is these two reasons that cause older models below the iPhone 11 to be unable to achieve "mask unlocking".
Of course, if you want to solve this problem, it is not impossible - for example, with the Apple Watch, to achieve the mask unlock function.
However, it is necessary to have a model above the Apple Watch Series 3 to have this feature, and the price of the Apple Watch Series 3 is 1499 yuan.
Many fruit powder jokes: after the official version of iOS15.4 supports mask unlocking, iPhone 11 and below full-screen model users, about equal to a loss of 1499 yuan. What do you think of this statement? Feel free to share your views!