How do I unlock iPhone SE when the password is forgotten?

If you are referring to forgetting your iPhone passcode, please take a look at this following article:

If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

If you are referring to forgetting the Apple Account password, please take a look at this following article:

How to remove Activation Lock - Apple Support

CherishedOwl996 wrote:

iphone unavailable

Thank you for clarifying. Then please follow the article below ⇢

If you see a iPhone, iPad, or Apple Vision Pro unavailable message or Security Lockout screen - Apple Support

CherishedOwl996 wrote:

Mine is an old phone se 1gen the article didn’t help

If your iPhone is on iOS 15.2 or earlier, please use the forgot iPhone passcode or disabled article.

if your iPhone is on iOS 15.2 or later, please use the iPhone unavailable article.

There are different kinds of "locks". Can you tell us what the message on the iPhone screen displays?

"Unavailable"?

"Security Locked"?

"Activation Locked"?

Something else?

If you are using a Mac, running an operating system prior to Catalina, you would use the iTunes application to reset an iPhone – instead of using the Finder.