Don't waste your time doing nothing : USE YOUR BRAIN! Give a logic operation to find the target number. Use 6 numbers to hit the target. Got Math will set you smarter. If it's not the case... watch the solution.
Allows the application to access the phone features of the device. An application with this permission can determine the phone number and serial number of this phone, whether a call is active, the number that call is connected to, ect.