Well, it’s still easier and cheaper 🙂

Then are you going to be using you current phone that will have your gaming screwed up by calls and text messages?

This is incredibly easy to solve, you don’t even need hacks.

Gaming on smartphones and emulation on Android exists though.

Or your old phone that you have to leave plugged in to use because the battery is shot?

To be fair that is not that bad, I recently did it with an iPhone 6s to play some old iOS games, gladly the device still holds some hours of gaming.

Also IDK what you mean by the audio thingy, but my phone has a jack port.