When you are going to resell your old iOS device, don't leave your personal information vulnerable to identify thieves. But "iPhone 'Restore' does not delete personal data!" - Warning From CNET. Here I Suggest you have a try with SafeEraser, It can help you erase your photos from your iPad/iPhone/iPod touch completely. Nothing Recoverable.

Watch Video:
Code:
youtube.com/watch?v=ZMJcC5Br1BM
SafeEraser - iPhone Data Eraser, Wipe iPhone Permanently, Delete Data Before Selling
> Permanently wipe all personal information from iPhone
> Works with all iOS devices - Jailbroken iPhone friendly and also compatible with carrier-locked iPhones

Supported iOS Version & Devices
iOS From iOS 5.0 to iOS 7.0

iPhone: iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, iPhone 4
iPad: iPad Air, iPad mini, iPad mini with Retina Display, iPad with Retina Display, The new iPad, iPad 2, iPad 1
iPod touch: iPod touch 5, iPod touch 4