Can I use a portable Wi-Fi hotspot router for my iphone 4?

I have an iphone 4 that is non activated. I also have this app that lets me make calls and text over Wi-Fi. I was wondering if I bought a hotspot, could I use it for my iphone. Also, does anyone know of any good & affordable portable Wi-Fi hotspot routers.

Yes. Wi-Fi will work in unactivated iphone.

You don't really have to buy a Wi-Fi router if you have a computer with Wi-Fi in it.

You can transform your pc into Wi-Fi hotspot.

Check this video -

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