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Building a phone farm
Which phones, boxes or cloud phones, what each one costs, and what a farm needs before the first account goes on it.
Building a farm. 2 articles.

Building a farm
iPhone Farm vs Android Farm: Which One to Build
Why Android is the default for a phone farm: an app on the phone can operate other apps, while iPhones need a Mac, code signing and constant upkeep. When an iPhone farm is still the right call.

Building a farm
Android Device Farms: Real Devices vs Emulators
Android emulators can be excellent automation targets, but some production workflows depend on physical hardware, carrier subscriptions, device integrity or hardware features that virtualization cannot reproduce. This guide explains how to choose.