iPhone Apple ID associations

[Sethide]

Hello,

I sold my iphone 3GS.
Before selling it I did a restore (under DFU mode*) with iTunes to iOS 6.1.2
After activation (with a spare SIM card I have), I saw my Apple ID in the setting, so I did a factory reset from the phone itself, after the (2nd) activation, the Apple ID email field was empty.
*At first I made the mistake to use factory reset from this JB iphone.

One thing I forgot is to remove the association of my phone with my apple ID.
I read this article.
iTunes Store: Associating a device or computer to your Apple I
(Sorry I cant post link: kb/HT4627)
I don't have "Manage Devices" option.
I can't remember if I have authorize my former iphone 3GS to automatically download anything from my iCloud.

What can I do now? (if needed?)
Thank you.

[Sparkee]

Change your Apple ID/iCloud and any other associated passwords on any of your apps. If you did an actual Restore as a new device there should have been none of your information left on the iPhone. If you Restored it using a back up then your information would have been restored on the iPhone as well.

[Sethide]

Yes I did a restore as a new device.
Thanks.