Question: why is ios 13 not available for iphone 6?
Answer: As Engadget described, the iPhone SE, 6S, and 6S Plus are the oldest phone models that will support iOS 13, meaning that the iPhone 6 doesn't make the cut. However, this doesn't mean that your iPhone 6 won't work once iOS 13 is released — it just means that you won't be able to download the operating system upgrade.