I have iPhone 6 Plus Jailbroken on 9.0.2. I wish to restore my phone and remove everything on it?

I have iPhone 6 Plus Jailbroken on 9.0.2. I wish to restore my phone to factory settings and remove everything on it because I'm giving my phone to my wife. I wish to retain my jailbreak though. If I'll restore my phone and remove everything will i have to reactivate the phone with Apple? If yes will activation happen even though Apple has stopped signing the iOS version?

What options do I have?

There's a program called Semirestore, which keeps your current iOS version BUT deletes all data on it.
Since you want to give it to your wife, I would recommend you a complete restore anyway, without keeping the jailbreak.