That’s a very nice phone camera! That, or I’ve an even poorer phone camera than I thought (on the grounds of having a full-body camera). You can probably find free apps for your phone that do simple RAW edits, but I can’t offer any advice. Dedicated cameras tend to come with software of varying quality (Canon is quite good!).

Nice capture of the wing feathers. Have you tried playing with your editor packages’s histogram tool (especially if you have a RAW format image) to see if you can recover more of the colour of the bird? This scenario of dark bird against bright sky always sees me tweaking things, often resulting in over-exposing the sky, which I don’t care about, to see more colour in the shadows of the bird (it’s what I was doing in my recently posted “Kite Seeking Kompany”).