Can I setup my iphone 7 without a sim card when I buy it SIM free?

I'm aware that unlocked iPhones need functioning sim cards to be activated however, apple released a SIM-Free iPhone and I was wondering if it works the way an unlocked phone does at first when bought or can I set it up without having to use a sim card and just use the phones features (pretty much like an iPod)

When is the iPhone X being released?

It' says it ships November 3rd. You can pre order on Oct. 27. When does it come out where I can just go down to my Verizon store and buy it? I want it before Christmas so do i have to pre- order or will they be avaliable?

Iphone video gets bright them dim?

I took a video with my iphone recently and it came out great the only problem with it is the brightness of it goes in and out. One second it is bright and clear then gets dark and dim. Is there any way of fixing this to make it the same brightness throughout or is that not possible?