My current smart phone is an HTC one M8. I love it for a number of reasons - general design, sound, has the best screen for using styli on and so forth... Today, and most days in fact, I drew on it (painted -mostly- on the bus from Woking to Guildford with the t-shirt added shortly after):
And sometimes (this morning as a matter of fact, and most days too) I used it as my main go to camera:
Which I love loads. I'm fairly aware that the M9 has a better camera, which I'd love to make use of, but new phones don't come my way too often, I'm generally a generation behind.
Regardless it's a top phone and well deserved the many awards it won last year. As an art and photography device? Well worth using. If you have one you should give Didlr, ArtRage, Corel Painter, Type Drawing, Snapseed and more a go.
A number of my students seem to think Face Fusion is the funniest thing ever as well. You should try that too...