How to open a locked iPhone using iCloud?

Hello!

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

Have a great day!

Sugarhillsammy wrote:

So ìt mean doesn't work anymore

No, not if you forgot your passcode. You can try to reset the passcode however. Just tap on this link for instructions: If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

Are you trying to tell us that this iPhone is Activation-Locked ("Locked to Owner")?!?