Can I put any sim card in the iPhone 4s?

I want to get an iPhone 4s for Christmas and I want to know if I can pit my t mobile sim card in there because I don't know if I can get the same deal for a micro sim

I ask u y nt?
What is phone even iPhone, without sim?
Can you use mobile without sim?

Yes, defiantly you can put any sim card in your iphone mobile.