Can I turn my iPhone 4 into 4s?

I want Siri, iOS 8, etc.

No you can't.
There are some themes that make your phone look like it has iOS 8, but it may slow down and this is for jailbroken devices only.

You can install Siri on an iPhone 4, but again you need to be jailbroken. No you have to get a 4S or higher if you want siri. No, I'm not even gonna answer this! No point doing it. Nope, you can't… No no

No you have to get a 4S or higher if you want siri.

No, I'm not even gonna answer this! No point doing it.

Nope, you can't.

No