How to Manage Multiple Android Phones Without Root
Managing one Android phone is easy.
Managing ten is where the small annoyances become the whole job: which device is connected, which one failed, which screen is stuck, which command ran where.
You still do not need root.
For many small device farms, USB debugging plus adb is enough. Handsets adds a thin command layer that lets you run the same action across multiple devices and get per-device results.