Why shouldn't I connect to an unknown public network?
Sometimes on a mobile device, the settings will configure to connect to an unknown network without notifying the user. There are many risks included in connecting to an unknown public network, such as a man in the middle attack which allows a hacker to position themselves between you and the router, sending your information straight to him. This could lead to a personal data leak of confidential information. Change the settings in order for the device to ask whether or not you want to join the discovered network.