The first step is to not panic. There are several solutions that will help you get back all or most of the lost data in little or no time at all. With a clear head, it is easier to go about data recovery. Otherwise, you might just end up creating more problems for yourself. Some of the most common methods are listed and explained below.
Data Recovery Methods
Data recovery program - Once this program is launched on to the device, the lost data is scanned and recovered. This includes contacts from phone book, text and other messages, photos, videos, notes, call log history, etc.
iTunes Backup - You can also extract and recover photos, videos, contact, note, and so much more from the iTunes backup file on your device. This is a faster and much easier method, and the program allows you to choose which backup you want to scan and restore. Make sure you choose the latest one.
iCloud Backup - Cloud computing has made our lives much easier, and data recovery has also improved, as a result. If you have backed up your data, and synced it using iCloud, your data recovery process is a piece of cake. All you have to do is sign in with your Apple ID, extract and recover the required files, and relax.
Third Party programs and applications - Apart from Apple's own recovery solutions, there are several other third party hosts that offer a wide platter of solutions to recover the data and information lost from your iPhone, just like Wiserecovery.