Do I have to activate my sim in my iPhone 4 before I can use Wi-Fi?

I've just got an iPhone 4 and haven't got a microsim yet. I want to play around on it but when i unlock the screen it says 'insert a valid sim with no pin lock to activate iPhone' and i can only make emergency calls. Is it supposed to be like that?

Yes, you will need a valid sim card in the phone before you can use it. Sorry