How to use iOS 14.3 on iPhone 6
How to use iso 14.3
[Re-titled by Moderator]
iPhone 6s Plus, iOS 12
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You can update your iPhone to iOS 12.5.7 by going to Settings -> General -> Software Update and installing the particular update.
Make sure your iPhone has
- charged to at least 50%
- preferably connected to the charger
- disabled any VPNs
- disabled Low Power Mode
- connected to a fast, reliable Wi-Fi
- at least 6GB of free storage
However, your iPhone cannot update to iOS 13 or later due to your internal hardware being too old to support it. Not iOS 14.3 either.
Apple ended major software update support for your iPhone in September 2019 - although it continues to receive security updates - with the most recent being iOS 12.5.7, released January 2023.
Many app developers have dropped support for iOS 12.x in its apps, often because the APIs in its apps have updated to the most recent version, making this iOS version not compatible.
The iPhone 6 Plus is over 8 years old.
iPhone 8 and later models are capable of supporting iOS 16.
You may consider buying a new iPhone. Even the entry-level iPhone SE can run the latest iOS version, iOS 16.3.1.
Here is a list of unsupported iPhones with max iOS supported:
Model Architecture Introduced Max supported iOS
iPhone (1st) 32-bit June 2007 iOS 3.1.3
iPhone 3G 32-bit July 2008 iOS 4.2.1
iPhone 3GS 32-bit June 2009 iOS 6.1.6
iPhone 4 32-bit June 2010 iOS 7.1.2
iPhone 4S 32-bit October 2011 iOS 9.3.6
iPhone 5 32-bit September 2012 iOS 10.3.4
iPhone 5C 32-bit September 2013 iOS 10.3.3
iPhone 5S 64-bit September 2013 iOS 12.5.7
iPhone 6 64-bit September 2014 iOS 12.5.7
iPhone 6 Plus 64-bit September 2014 iOS 12.5.7 <- Your iPhone model
iPhone 6S 64-bit September 2015 iOS 15.7.3
iPhone 6S Plus 64-bit September 2015 iOS 15.7.3
iPhone SE (1st) 64-bit March 2016 iOS 15.7.3
iPhone 7 64-bit September 2016 iOS 15.7.3
iPhone 7 Plus 64-bit September 2016 iOS 15.7.3