Objective: How can I change my password from another phone?

Which of the following solutions is more sound in terms of naive physics reasoning?

(a). On devices without Touch ID, go to Settings > Passcode. You'll find several settings and options: Turn Passcode Off: Tap this option to turn off your passcode. Change Passcode: Enter a new six-digit passcode.; (b). On devices without Touch ID, go to Settings > Passcode. You'll find several settings and options: Turn Passcode Off: Tap this option to turn on your passcode. Change Passcode: Enter a new six-digit passcode.;
(a).