Testing on actual device hardware can be costly, but will always provide the most accurate results.
Pros
- Testing on actual devices provides access to real device capabilities and constraints. These include device CPU, physical size, manipulation options, screen size, dpi, screen quality, and overall device responsiveness. Testing on devices (using a network SIM card) will also enable you to determine the impact of network speed and latency.
Cons
- Testing on actual devices is expensive. Unless you have access to a local test lab (or a community through which you can borrow devices), you will need to purchase the devices you need.