What do I do to get Wi-Fi without need for password to get Wi-Fi?

Whenever I have Wi-Fi option on iPhone 4 you always need a password to get the Wi-Fi, but I do not have password. How do I get Wi-Fi on phone without password?

Added (1). No breaking law

Buy a internet plan on you phone, get your own wi-fi, or hack someone elses router.

That Wi-Fi belongs to someone. If thy have password protected THEIR network, then you need a password.