This document discusses how to scale mobile testing across several teams. It describes the challenges of scaling mobile testing in a company that started as primarily web-focused. Key steps discussed include establishing feature teams for each mobile platform, implementing a release train model with fixed release dates, growing test automation capabilities for both iOS and Android using shared frameworks, and investing in tools and infrastructure like a mobile test farm. The document emphasizes that communication is important, mobile skills are needed, and the testing environment requires ongoing investment and reconsideration.