How can I log out of my Apple ID on my iphone 4 because I have the iphone 5 now?

Jae Sinz wrote:

...How can i log out of my apple id on the 4...

Settings > Store > Apple ID = Log out.

Jae Sinz wrote:

...so i can sell it without worrying about someone having access to my things?

ERASE / Clear All Data

Go to Settings > General > Reset > Erase all content and settings

Before you erase your phone, you need to first delete the iCloud account, sign out of FaceTime & iMessage. If you don't, this phone will still be linked to your Apple ID. Once you do that: Settings>General>Reset>Erase All Content & Settings.

But, delete iCloud & turn the other stuff off first...important you do this.

What if you didn't do that first? I gave my son my iPhone 4. I erased all content and settings first, so he had to set up the phone. But I did not sign out of iCloud, FaceTime, iMessage or anything else. So far, the only thing I've noticed is his Notes wind up in my notes.

Welcome to the Apple Support Communities

Open Settings > General > Reset > Erase All Content and Settings