I no longer wish to use my old iPhone 3GS. I used to use my Apple-ID to log into The iTunes & App Store on it.
Since I use that Apple-ID for iTunes & App Store on several other iDevices, I want to completely deauthorize and unregister the iPhone 3GS from my Apple-ID.
I have already signed out of iTunes & App Store on it. Can and should I "deauthorize" it in any other way?
I no longer use the iTunes program on any computer, so the iPhone is not connected or synced to any computer of mine . (And I don't want to install iTunes, I don't like the program).