Google is paying people to attack their systems. Their new contest, nicknamed "Project Zero" was created to "find a vulnerability or bug chain that achieves remote code execution on multiple Android devices knowing only the devices’ phone number and email address. Successful submissions will be eligible for the following prizes."
You have to be able to access the Android system using nothing but a phone number and email address. First place will get $200,000, second for $100,000, and third place will get $50,000.
If you think you're up to the task of taking on the biggest internet technology company in the world, read more about this contest on the follow blog article: https://googleprojectzero.blogspot.ca/2016/09/announcing-project-zero-prize.html