cant unlock my iphone phone because of magnified screen

You have activated the Zoom feature. Double-tap three fingers and drag to change the zoom. Then go into Settings>General>Accessibility and turn zoom off. Also see this support document for further information about Accessibility features. Use Accessibility features in iOS - Apple Support

What is not working? You use three fingers to change the zoom level and you should be able to enter the passcode. You use 3 fingers to move around on the screen. That should give you the access you need.

You're welcome.

thanks that worked.