I wouldn't be surprised if the mobile phone is now the #1 picture-taking device. Even for me as a photographer, I don't have my cameras with me 24/7, but my mobile phone is usually within my reach. So when opportunities present themselves, I find myself picking up my phone and compose. Although the quality of the pixels is still lacking (lens quality and size still matters), the high-res pictures and powerful apps available allow me to play around and make some small art pieces or proof-of-concepts on the go. Quick posting on social media is also a big plus.
So, you have been taking pictures with your phone, but they never look anything like what you saw on other people's Instagram? Well, the phone/camera is only part of the equation. Careful composition and then some post-editing could go a long way. Regardless whether you are an Apple or Android fan, there will be no shortage of editing apps in the App Stores, from Apple, Google, Adobe, and smaller developers, some free and some with fees. Most apps are quite intuitive; many include "filters" or "presets" that give you a certain effect. Play around and choose one that you are most comfortable with, or you could ask your friends whose work you admire. In any case, sharpen your tools and give it a try! Practice makes perfect!