1.) one with the minimum hardware you want to support (screen res, cpu, gpu).
2.) Min API level you want to support
3.) top spec phone with latest version (pref. a recent nexus)
That is for native platform apps, not Game ports.
From my experience, crucial to success is that you write your Apps according to the Android documentation, and not just "until they work on my device". Most "single device issues" happen because of this mistake.
Most of the issues developers have when they switch devices
2.) Min API level you want to support
3.) top spec phone with latest version (pref. a recent nexus)
That is for native platform apps, not Game ports.
From my experience, crucial to success is that you write your Apps according to the Android documentation, and not just "until they work on my device". Most "single device issues" happen because of this mistake.
Most of the issues developers have when they switch devices