Well the obvious answer is your phone would melt and be destroyed in the fire.  Whereas when you mine BURST you simply plot some free space and it uses that to mine...so it runs in the background and doesn't overheat/use the resources of the device.  Very low energy/green/eco friendly.

I can't believe how many people don't know about the BURST mining technology.  There are people that are going to make a KILLING mining this coin (obviously not just through android mining).