My favorite was how the first android phone was rooted. They left a root terminal running in the background, so for example if on your homescreen you typed "reb

My favorite was how the first android phone was rooted. They left a root terminal running in the background, so for example if on your homescreen you typed "reboot" and hit enter, your phone would reboot. So all you needed to do was launch a telnet daemon and you could telnet in and do whatever you wanted to the device.