iPhone "Restore" does not delete personal data! - Warning From CNET

If you're selling your iPad or passing it on to someone else, the first thing you'll want to do is make sure they won't have access to any of your personal data. Wipe everything from your iPad: contacts, messages, photos, videos, apps, account info, passwords and other personal data stored on iPad.

Video Demo:
Code:
youtube.com/watch?v=wj_rS2dLfiM
Wondershare SafeEraser
iPhone Data Eraser, Wipe iPhone Remotely, Delete iPhone Data Before Selling
> Permanently erase content from your iPhone 5S/5C/5/4S/4
> Works with all iOS Devices - Jailbroken iPhone friendly and also compatible with carrier-locked iPhones

Supported Devices:
iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, iPhone 4

iPad Air, iPad mini, iPad with Retina Display, The new iPad, iPad 2, iPad 1
iPod touch 5, iPod touch 4

More Info:
Code:
ios-data-eraser.com/