Have 14.5 software update for iphone 6 plus cannot update.

iPhone 6s and later have sufficient memory and hardware resources for an upgrade to iOS 13 and iOS 14, while iPhone 6 and earlier lack the necessary memory.

iPhone 6 will not upgrade past iOS 12.

iPhone 6s doubled the memory available over iPhone 6.

There are no hardware upgrades for iPhone, short of a newer or new iPhone.

WLIncPeters wrote:

Surprising how an Iphone 6 plus becomes outdated so quickly vs any Androids.

Ironic that you would mention being outdated. The iPhone 6 Plus has had 5 different versions of iOS ...... most androids devices have a maximum of 2 versions of Android OS before updates are ended.

stedman1 wrote:

…The iPhone 6 Plus has had 5 different versions of iOS ...... most androids devices have a maximum of 2 versions of Android OS before updates are ended.

Yep. Some Android vendors are now offering up to ~three versions and up to ~three years as a product differentiation:

https://9to5google.com/2020/08/17/samsung-android-update-policy-list/

Your iPhone 6 Plus is not compatible with iOS 13 or 14.