Picture source: Apple's official website
Today Xiaobian IPWS website stroll around, unexpected discovery has always been to allow users to downgrade the iPhone Apple did not actually shut down the system downgrade channel, really made kind, which for those who are not satisfied with the current system using iPhone users is undoubtedly a Good news, let's take a look at the major iPhone support downgrade situation:
iPhone X: Dropped from iOS 11.2.2 to iOS 11.2
iPhone 8Plus: Dropped from iOS 11.2.2 to iOS11.2
iPhone8: Dropped from iOS 11.2.2 to iOS11.2
Source: IPSW official website
iPhone7 Plus: Dropped from iOS 11.2.2 to iOS11.2
iPhoneSE: Dropped from iOS 11.2.2 to iOS11.2
iPhone6s: Dropped from iOS 11.2.2 to iOS11.2
iPhone6: Dropped from iOS 11.2.2 to iOS11.2
iPhone7: Dropped from iOS 11.2.2 to iOS10.2
Source: IPSW official website
iPhone5s: Dropped from iOS 11.2.2 to iOS7.0.3
Source: IPSW official website
iPhone5c: Dropped from iOS 10.3.3 to iOS7.0.3
iPhone5: Dropped from iOS 10.3.3 to iOS6.1.3
Source: IPSW official website
From various iPhone device support downgrade situation, iPhone5s support down the most level, from the current iOS11.2.2 to iOS7.0.3, iPhone7 can be said to be lucky, whether it is the predecessors iPhone6 / 6s series, or its peer iPhone7 Plus , Only it can fall to iOS10.2, the other can not.
If you have the idea of downgrading your iPhone, you may want to go to the IPSW official website to see the situation, download the appropriate firmware, and then downgrade the system according to the order of operations.