January 17 news, today's iPhone Xs Max National Bank Edition actually opened the iOS 14.1 (18A8395) version of the signature, users can downgrade the system.
Generally speaking, after the release of the new version of iOS, the verification channel of the previous version will be closed, and the user can only upgrade the system, not downgrade. iOS 14.1 was officially released on October 20, it is reasonable to say that the update channel should not be launched again, this situation is not known whether it is caused by a system BUG.
When I first started contacting smartphones, the Android system could brush the machine at will, so Xiao Lei did not understand why the manufacturer did not allow the device system to be downgraded for a long time. The reason given by the vendor is that the new system includes security patches, and in order to prevent the user's property from being threatened, it is not allowed to downgrade the system. The premise of not allowing users to downgrade the system is that the new system experience is good enough that there will be no too serious bugs.
Due to the small number of iOS 15 upgrades, Apple recently closed the iOS 14.security update, that is to say, iOS 14.8 users can not update to iOS 14.8.1, can only upgrade to iOS 15.
However, recently Apple's WebKit engine has a serious BUG, resulting in macOS, iPadOS, iOS three platforms of Safari 15 browser vulnerabilities, the user's privacy information may be stolen by the visited website. The more serious problem is that Apple requires that all browsers on the iPadOS and iOS platforms must use the WebKit engine, which means that third-party browsers may not be spared.
Apple failed to provide a reliable new system when it was mandatory for users to upgrade their systems, which may be why many iPhone users are reluctant to upgrade their systems. Although Xiao Lei's iPhone system was upgraded, although it did not encounter any serious bugs, the phone battery life really dropped a lot.
Nowadays, not only iOS, Android mobile phone manufacturers have also turned off the system downgrade verification, and first- and second-line brand mobile phones do not allow users to brush the machine themselves. They do not let users downgrade the system, Xiao Lei is not opposed, but please optimize the new system, in the past two years, a certain Android manufacturer that once took the system as a plus, the system has been so bad that it has become a minus item, and I hope that other mobile phone manufacturers will take it as a warning.