how do you fix the device is not eligible error? i did everything already

i254 wrote:

I wanted to downgrade to 9.0.2

That is why you are getting the error. Downgrading is not supported, and iOS 9.0.2 is no longer being signed. You will only be able to update to iOS 9.2. Connect the device to iTunes on the computer, and just click on update. If the error returns, then put the device into Recovery Mode and update to iOS 9.2.

Typically, "Device not eligible for requested build" means the iPhone has been jailbroken. Is this true in your case?

If you see Error 3194, Error 17, or 'This device isn't eligible for the requested build' in iTunes - Apple Support

Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issu…

i254 wrote:

why is that?

Why is what? That Apple does not allow downgrades? The Terms of Use of these communities forbid us from speculating about why Apple does or does not do whatever it does (or does not do).

But for what it's worth, if I were sole owner of a company like Apple and could do what I want, I would not allow downgrades either. You should stay current.

Are you using iTunes 12.3.2?

i254 wrote:

why is that?

Like I said, it isn't supported. It has never been supported. Just follow the instructions in my post to try and recover your device.