With the releases of the iPhone 11 and iOS 13, Apple has decided to no longer push new updates to the iPhone 6 series device making the device a 'legacy' device as related to Apple. This does NOT mean that the iPhone 6 or 6 Plus are bad or outdated devices. This just means that Apple, again, is trying to force users to upgrade their devices.
Instead of spending $699 or more to upgrade your iPhone 6 or 6 Plus device to an iPhone 11 device save your money and get your cracked screen replaced instead. iPhone 6 and 6 Plus screen repairs are now only $69.99 (regularly $99.99).
If you have a kiddo who you are thinking about purchasing an iPhone device for I highly recommend iPhone models 6/6Plus, 6S/6S Plus and 7/7 Plus devices that are easy to operate and fairly inexpensive to purchase under $299. Renewed/used iPhone 6 32GB devices are for sale starting at $99.