iOS 12.5 devices plz sir
Sir my I phone iOS device 10.3.4 ha sir my iOS device 12.5 kar da / request you so much sir
The built in hardware of an iPhone has to support newer iOS versions:
Older iPhone models, like for example the iPhone 5, 6 or 6Plus can only be updated to iOS 12.5.7
In such a case, you will need a newer model to be able to install newer iOS versions.
iOS 13 and iPadOS are compatible with these devices - Apple Support
iOS 14 and iPadOS are compatible with these devices - Apple Support
iOS 15 and iPadOS 15 are compatible with these devices - Apple Support