Your analytics name the OS versions and models that matter — cover ~85% of real usage with a focused physical tier, cloud device farms for the tail.
Interruptions (calls, backgrounding), permissions flows, network transitions (Wi-Fi→cellular→dead zone), and battery/storage pressure — where mobile bugs actually live.
Airplane-mode workflows, queued-change reconciliation, and conflict handling for field apps — the scenarios support tickets are made of.
Critical journeys on a small real-device set in CI; exploratory and release passes staying human — full-matrix automation is a cost center wearing a QA costume.
Skipping the discipline this article describes until an incident, audit, or stalled project forces it — every practice above is cheaper adopted early than retrofitted under pressure.
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