https://www.applecombill.com/iforgot-apple-com
Resetting your Apple ID password via email is another effective option if you don't have access to all your devices or simply don't wish to go through the hassle of changing passwords on every one. To use this method, launch an application that uses your Apple ID - such as Messages or Mail - then enter both your Apple ID and lock screen passcode for authentication, in order to display a code; write down this recovery key number before following prompts from Apple to change your password. If you wish to use this approach, you must be able t