*I downloaded IOS 7and it did not come with SIRI. How can I download that to my phone?
This is correct.
Why did you think it would come with Siri?
Iphone 4 will never have Siri.
Siri doesn't "come with" iOS 7, your hardware has to support it. Since you have an iPhone 4 it does not, and will not ever support Siri, er Sorry.
The iPhone 4 does not get siri. The minimum hardware requirements for iPhones would be an iPhone 4S.
Retrieving data ...