Can I transfer my sim card and use an iphone 4?

Well I have a regular phone with no data plan, just calling and texting. My dad upgraded to an iphone 5 so he has no use for his iphone 4.Is there a way I could use it, just for texting and calling, without getting charged for the smart phone things? Also I'll just use the Wi-Fi at my school or home. I have at&t.

No you can't transfer your sim card from your regular phone to the iphone because the iphone 4 sim card is small and not the same size as iphone 3g's or regular phones. Only thing you can try and do is going to your provider and see if you can get a iphone sim for just calling and texting but I doubt it