Good day! I'm wondering if I can get a little help. I have a basic phone running android. It is a Sonim XP5s (XP5800). I found I could sideload apps using a computer, Windows PowerShell, and the "adb install..." command. Poweramp v2 is the only app I found that would work with the physical keys on my phone (it doesn't have a touchscreen). I bought the app through your website as my phone runs a stripped-down version of android 7.1.2 that doesn't include gapps. However, the registration code doesn't work. It says my email isn't registered on my phone. And looking at the options in the s