You can take RAW photos with your iPhone, you just can't do it with the default Camera app. Apple does allow third-party apps to access the hardware and software needed to take RAW photos, so you can use one of the many options to do it. RAW photos provide a lot more flexibility than HEIC or JPEG photos, but with a much larger file size. Using a third-party app means you can keep using the Camera app for regular photos and use the other app when you want to take RAW.
Back in 2008 we created a huge set of 250 free iPhone ringtones for people to download and use on their iPhones. The page has been updated to put all of the ringtones in one huge list, make it easy to preview the tones, and also easier to install them directly on your iPhone. Check out this tutorial on how to download them without needing to sync with a computer and iTunes.