My iPhone 4s doesn't have Siri?

I got my iPhone 3 days ago. I'm absolutely used to the system due to the fact that I've had my iPod 4g for 2 years. My brother also has 4s and Siri works perfectly fine. However, on mine, Voice Control pops out instead. I went to settings > general and there was no Siri to turn on. I'm sure it is 4s because it has all the physical characteristics of it. Please help! Thank you!

Added (1). If I press the home button for 2 seconds, Voice Control comes out. Not Siri. I know the difference. I get the blue voice control like on the Ipod touch

Press the home button… Hold it down for like 2 seconds it should work

It could be that you don't have iOS 6 yet. Go to Settings>General>Soft ware update. If you have an update it is for iOS 6, which has Siri. If that doesn't work, Then you don't have an iPhone 4S…

Turn off voice control in settings and activate siri in settings.

Hold down the home button for a couple of seconds. If that is not working, it is not an iphone 4s.

  • Why is IPhone Siri funnier than iPad Siri? I have an iPad mini. Siri is so boring on mine. She just says, "I can't answer that." Or "is that so?". On my friends iPhone, she replies really funny. Also on the Internet I see funny convos with Siri all from iPhone and not on iPad mini. Why is it that siri is funnier on iPhone? They are both part of apple!
  • Why doesn't siri on iphone 4 work properly? I downloaded Siri using cydia. She works, and do simple tasks like set an alarm, set a timer, or send a text, But when i ask her to search for places near me her answer is always sorry i can't find games for such and such. Her answers are almost always irrelevant to my question. There was an option to buy Siri for 99 cents that uses google, and seems more legit than the free downloaded. Can anyone help answer my question as to why Siri is acting "stupid"?
  • Why doesn't my iPhone 6s doesn't have night shift? When I go into settings and then into brightness there's no option for it! My phone is completely updated The title was worded badly on my part but you know what I mean
  • Why doesn't my iPhone 4S activate Siri? It is an iPhone 4S btw, I'm sure. I've went settings-general- and Siri is not there. When I hold my home button down only voice control works. Yes I have iOS 7