how to restart or reactivate iphone4 with iclould password

Hi alageswari,

It sounds like you are being asked for your Apple ID password to turn off Activation Lock and we want to help.

Follow the steps here:

Turn off Activation Lock - Apple Support

If you've forgotten your Apple ID or password, follow the steps here:

If you forgot your Apple ID - Apple Support

If you forgot your Apple ID password - Apple Support

Good luck.

Thanks for using the Apple Support Communities.