There is no software update on my I phone 6

If you already have iOS 12.5.7, you have the most up to date software for your iPhone 6. There are no more updates available for your old phone.

That is a true statement. Your almost 9 year old iPhone is not compatible with any iOS versions higher than 12.

That is a true statement. Your 9 year old iPhone is not compatible with any iOS versions higher than 12.