Risk-based device selection (example: important for a game)
Emulators & Simulators
Multi-layer test (example: important for an in-house CRM)
##Risk-based device selection
Experience
Statistics
Boundary Cases
Exclusions
##Multi-Layer Testing
Testing pyramid - compared to food pyramid
Multi-Layer architecture - choose the right layer for each test, not any layer must be skipped, especially not the UI-level, most of the severe bugs appeared on all devices, so can be found by testing on e.g. the service layer
##Emulators and Simulators
Unfortunately, the speakers could not provide any useful information about alternative emulators or how to speed up the slow emulator performance especially on Android. But they mentioned a tool to simulate real network traffic:
WANem - simulate network behavior for mobile testing