Can i use a non working iphone on Wi-Fi?

Can i use a non working iphone on Wi-Fi?

Not if it doesn't work

if you mean an iPhone that has been blocked, or reported lost/stolen, yes, it works just like an iPod touch.

Of course you would be able to use the internet, email and download apps through Wi-Fi. However you won't be able to use any of the calling features like that of a phone.