Apple's iOS 15.4.1 system has been pushing for a long time. Overall, this version of the iOS system is designed to fix the bugs that appear in the iOS 15.4 version. Therefore, at that time, many iPhone users who had upgraded to the iOS 15.4 system would not hesitate to choose to upgrade iOS15.4.1, and the purpose was simple: they wanted to have a better experience.
And I, because I was holding the iPhone 11Pro Max, and considering that the mask unlock function added by iOS15.4 did not support the iPhone 11Pro Max, I did not upgrade the phone at that time. Of course, without upgrading to iOS 15.4, there is naturally no problem with poor battery life. For this reason, there was no interest in iOS 15.4.1 at first.
Later, I couldn't resist the "temptation", and there was always a reminder in the settings, so just yesterday I did not hold back and upgraded the iOS 15.4.1 version to the iPhone 11Pro Max. There is a saying that the upgrade process is quite smooth, the phone is not hot, there are no special circumstances, after the upgrade I did not experience the so-called "mask unlock" function.
Because I know that the iPhone 11Pro Max is not supported on hardware, it is simply not necessary to experience it, saving trouble. It is for this reason that after updating to iOS 15.4.1, I mainly focused on three places, corresponding to three feelings.
Battery life
Frankly speaking, holding an old model such as the iPhone 11Pro Max, and has not replaced the battery, the most worrying thing about upgrading the new system is the battery life. So, when upgrading to iOS 15.4.1, I first looked at the battery life of the iPhone 11 Pro Max. Through a day's use, I found that iOS 15.4.1 is satisfactory to my performance in battery life optimization.
In other words, when you go out with a fully charged iPhone 11Pro Max in the morning and go home at 7 p.m., you still have 45% of the battery left. In terms of frequency of use, in addition to opening the Wi-Fi hotspot, the other is to watch WeChat, brush videos, brush Weibo, and do not play games. Therefore, on the whole, the battery life performance of iOS 15.4.1, I still recognize.
Running speed
According to the hardware configuration of the iPhone11Pro Max, in fact, Apple's A13 bionic chip runs the iOS15 system without much pressure. Moreover, the iPhone11Pro Max is also the top model in the iPhone 11 series. For this reason, I don't think there is any need to worry about this. Of course, if your mobile phone battery health drops to the maintenance state, it may affect the normal operating speed of the mobile phone, at this time you may consider replacing the battery to ensure that the performance is in a peak state.
Signal
Since my iPhone 11 Pro Max uses a single-card mode, I have not encountered signal problems after upgrading iOS 15.4.1. At the same time, when running the previous version of the system, my iPhone 11Pro Max did not encounter a poor signal. Therefore, when experiencing iOS 15.4.1, I also paid special attention to it, and there was no problem.
All in all, the system of iOS 15.4.1 is not as worrying as imagined. Especially for users of older models such as the iPhone 11Pro Max, I hope that my feelings can provide you with reference.