If you use the computer frequently, you must have encountered such a situation that your PC needs to be rebooted. In the same way, sometimes iPhone also needs to do so. Although the most common and ideal way to solve this problem is to use a soft reset, it won't be contributing all the time. In this regard, you need to ask the hard reset for help. So, the question is coming, what's the meaning of "a hard reset"? It is a process that makes your iPhone back to the factory settings. That is to say, all your data, preferred phone settings and apps which are saved in your phone from the time it leaved the factory will be removed as a whole.
Some users may be figuring out how to wipe iPhone 4 or iPhone 4S data permanently. Before you sell your phone, it is necessary to ensure that all your personal data have been erased completely. No one wants his or her own data left in the phone while selling it, since it can give away your privacy and this can bring about a disaster to you.
After using the iPhone 5S/5C/5/4S/4 for a while, there must have been something personal or private on it, like messages, photos, call logs, and contacts. If you plan to sell your iPhone in order to get a newer one, then it is quite important to erase your iPhone data thoroughly. Although you can manually delete most of them, chances are that you might leave some part of your personal data on your iPhone prior to selling. At present, data theft is often reported or known everywhere. If you don't want to be a victim of it, it is wise to learn how to completely clean up iPhone data.