First of all, I am newbie on freelancer* so i will make it really good and as well for cheapest price , that's all i can say, i have experience in java,android,ruby languages , also worked with databases etc...
I have a Samsung Galaxy S7 Edge (Andoid 6.0.1.). I have a ton of experience in Android apps and the OS itself. I know typical bugs and flaws in "the average" Android apps. I can even stress-test apps.