What is the iphone 5 processor speed? - 1

I wanted to know or to make sure that if iphone 5 is 1.2 ghz or from 2.4 gh to 5 ghz. So my friend said that iphone 5 cpu speed is from 2.4 to 5 ghz
So i disagreed with him because i went to the website of apple and i saw the number 2.4 ghz to 5 ghz and i realized the it was talking about Wi-Fi speed. I told this to my friend but he disagreed again and said the Wi-Fi unit is bgn so i asked him then why they added brackets before 802 b/g/n and after 5 ghz. Please help me

Apple website: http://www.apple.com/...e-iphones/

I phone 5 has a Dual-core 1.2 GHz processor
http://www.gsmarena.com/...5-4910.php

5 ghz? LOL you guys are nuts