I was just thinking... a smartphone would have more sources of entropy for use in PRNGs than desktops and laptops due to having more sensors. For example, my Nexus phone has a barometer and theoretically, noise input from the barometer could be used to generate more secure random numbers. Even better I suppose would be to use noise input from the other sensors too as entropy sources.

Anyways... if how I am thinking is correct, then devices with more sensors can potentially be better able to generate random numbers for use in cryptography functions.