December 21 news, last week Apple launched the iOS 15.2 official version, according to the convention, today Apple closed the iOS 15.1.1 verification channel, has upgraded the system of users, will not be able to downgrade the system.
This is Apple's traditional operation, after the new system is updated for a period of time, it will close the old system verification channel and prohibit users from downgrading the system. In fact, not only Apple, Android mobile phone manufacturers are also like this, most of them are not allowed to allow users to downgrade the system.
On why mobile phone manufacturers do not allow the system to downgrade, netizens have given different views, Apple's own statement is that the system update manufacturers contain vulnerability fixes, in order to ensure the safety of the user's device, so it will prohibit system downgrade. At the same time, all devices use the same system, app in the development of no effort to improve software compatibility, software volume, running efficiency can be a certain improvement.
However, the system cannot be downgraded, and after the new system has a bug, the user can only suffer silently until the next version is updated to fix the BUG. Fortunately, now iOS, Android are very mature, generally there will be no vicious BUG, even if there are some problems, it will not particularly affect the user's experience. If there is a real malignant BUG, the mobile phone manufacturer will usually fix it in the shortest possible time.
Of course, these so-called system vulnerabilities, ordinary people will not have any feelings. The vast majority of iPhone users around Xiao Lei will update to the latest system version, but there is also an example, a friend who uses iPhone 11, the system is still stuck in iOS 14.3, the reason why he does not update the system is very simple, lazy to update, feel that there is no difference in daily use.
Take iOS 15.2, the official log shows that the new system is mainly to fix some bugs, add digital heritage, App privacy reports and other functions, Xiaolei upgraded the system, never experienced these features, before using iOS 15.1.1, I don't know what bugs there are.
Finally, let's talk about whether to update the system at the first time, there is no problem with updating the new system on the line, even if there is a BUG, it doesn't matter much. If you feel uneasy, you can also wait for others to update and observe a wave of word of mouth. In fact, whether the first time to update the difference is not big, after all, the new system is better than the old system, it is really not easy to experience, unless the version gap is very large.