Forgot the wireless router password how to do?

The original is a desktop direct access to the Internet, after the increase of the laptop, bought a wireless router so that desktops and computers can access the Internet, and then the desktop is broken but the laptop through the wireless router can also surf the internet, and then mobile phones also want to use wireless router Internet, but found that the password forgotten Can you tell me how to find the password of the wireless router in this case?

Just press rest and reset your password

Turn the router over ... See a hole. It's just a sign.