How to figure out what type of Iphone I have?

My uncle just shipped me a perfectly new looking Iphone a few days ago, but not in the box it came in. All I received was the Iphone itself and the Apple charger (since it was his phone and not completely new). I'm wondering how I can figure out how many gb it has and what type of Iphone it is (I know it's either the 4 or the 4s)? I need an reply as soon as possible and I will choose a best answer!

Go to settings Go to general and if there's an option of Siri it's 4s and if not its a 4 and go to options Go to general Go to about and where it says capacity that's how many gb's (it won't be exact it like if it a 16 gb it might say 14) but whatever ones closest is what you have

Well, the ways to tell if it is a 4 or 4s is 1: it's a 4s if when you hold the home button for one second and a "what can I help you with" little banner comes up at the bottom of the screen. And if it is a 4 and you hold it in a voice control will pop up covering the whole screen in blue. And to find out how many GB it is it should tell you if you plug it into a computer and open up iTunes.

Go to the icon called "Settings." Then select "General" and touch the "About" option. This will give you your phone's model number.

Then you can reference the link below to figure out which one you have exactly.

Look at the black bands around the top. If there are 4 of them, 1 on each corner, then its a 4S. If not then it is the 4, which has 3, 1 on the top & 2 on the bottom side.