How can i update my iPhone wit iOS 15.5?
How can I update my iPhone with ios15.5 bcos it running slow and doesn’t download some applications due to iOS 12.5 on it
iPhone 6 Plus, iOS 12
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Hello,
There are different ways to ensure the highest iOS that your device will support is installed on your device.
Any equipment currently running iOS 12.5.7 can't be updated to anything higher.
This support article has instructions about updating an iPhone or iPad wirelessly --> Update your iPhone or iPad - Apple Support Read the article for recommended criteria for being able to use wireless updating.
You can also use Mac and PC computers to update system software --> Update iOS on iPhone - Apple Support
If you want a video about doing this, follow this link —> https://www.youtube.com/watch/1FcE86kwODQ
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. If you want to run a higher system version than your current device is capable of running, you need to buy a newer device.