How to recover a forgotten Apple ID without access to a trusted device or a IOS device iPhone is considered to be the best in case of security. What should be done if the Apple ID is lost or forgotten and the iPhone is turned off, and there is no other way to start it?

This has happened with me twice and this time the problem is again the same. It's a big loss for me to buy a new iPhone every time. Please give me best guide so I can fix this problem.
It's possible to recover an Apple ID even if you have forgotten your login email and password. Refer to the Apple Support article, If you forgot your Apple ID.


  Use your Apple ID account page
  
  
  Go to your Apple ID account page and click Forgot Apple ID or password.
  When you're asked to enter your Apple ID, click If you forgot your Apple ID, you can look it up.
  Enter your first name, last name, and email address. If you enter the wrong email address, you can try again with a different one.