iPhone Data Eraser app can help you wipe everything from iDevices, including contacts, messages, photos, videos, apps, account info, passwords and other personal data stored on iDevices. See more at: http://www.iphone-data-recovery.com.
Other tips:
How to Delete Songs from iPhone
How to Delete iPhone Data Before Selling
How to Delete Photos from iPhone
How to Delete Messages on iPhone

To erase data on iPhone/iPad/iPod, you can use the iPhone Data Eraser.



There are some useful guides:
Delete iPhone Data before Selling
Delete iPhone Data Permanently
Permanently delete iPhone text messages

Free iPhone Care can optimize and fine-tune your iPhone, iPad, iPod to maximum performance by removing more than 20 types of junk files.
More:
No body want to miss it: Free iOS Ads Remover
However, if you regret to delete your iPhone/iPad/iPod data, you can use iPhone/iPad/iPod data recovery software to recover.
The homepage: http://www.any-data-recovery.com

How to Wipe iPhone Data Before Selling? For iPhone users who want to sell his iPhone might be hesitated when attempts to delete the data stored in his iPhone. So how to delete the stored data? Will the entire data be deleted permanently?
How to Wipe iPhone Photos
Many people wonderring whether any feasible way available to iPhone users to delete iPhone data? Absolutely yes.How to Delete Apps on iPhone
Here, I recommend you iPhone Data Eraser, which is empowers iPhone users to delete the entire data stored in iPhone and make it sure that those deleted data cannot be recovered any longer. All the process of operating iPhone Data Eraser are easy to follow.
How to Delete Messages from iPhone
Now, you can get more detailed information at the following part.
How to Delete iPhone contacts

Tenorshare iPhone care pro can help you free up disk space on iPad/iPhone/iPod , come on and have a try ! You can't miss it. I find it in this homepage !