How can I update my iPhone 6 Plus to iOS 14?

akanbi32 wrote:

I want to buy new iPhone

Please do. You can see descriptions of iPhones that Apple currently sells here:

iPhone - Apple

In some countries, the online Apple Store has both a new section and a Certified Refurbished section.

I would suggest getting an iPhone that will be compatible with iOS 18. (See the compatibility list at the bottom of the iOS 18 Preview page.)

iOS 18 Preview - Apple

If you are thinking of buying a used iPhone to "save money", I would suggest reading

The All Too Common SAD Reality of Buying a Used iPad/iPhone – Apple Community

so that you know how to avoid accidentally buying a carrier-locked phone, or a useless Activation-Locked brick.

An iPhone 6 Plus cannot update past iOS 12. If you need a newer iOS version, you will need to get a new phone.

Buy a new iPhone.

I want to buy new iPhone

Please proceed.