IOS 14 for iPhone 6plus
How to install IOS14 on iPhone 6plus
iPhone 6 Plus, iOS 12
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Hello,
You can't on a 6plus.
There are different ways to ensure the highest iOS that your device will support is installed on your device.
This support article has instructions about updating an iPhone or iPad wirelessly --> Update your iPhone or iPad - Apple Support
You can also use Mac and PC computers to update system software:
Update iOS on iPhone - Apple Support
When updating, your device will update to the highest version currently available that it will support, or it will just say it is up to date (and can't go any higher) and won't install anything. Apple indicates ( Unable to update my iPhone 6 Plus from 12… - Apple Community ) I need to point out the obvious and state that if you want to run a higher system version than your current device will run, that you need to buy a newer device.
- Any equipment currently running iOS 12.5.7 can't be updated to anything higher.
- An iPhone 5S, 6, or 6plus, can only update to iOS 12.5.7