Generally, there are three methods to regain your information by using FoneLab for iOS, the first one is Recover from your iOS device and the second one is Recover from iTunes Backup File. You can also recover your data from iCloud Backup file.
The first mode will ask you to input password if you have never connected your iOS devices with iTunes before. However, you will possible retrieve information on your iOS devices without entering password if your device has been connected with iTunes before.
In addition, even if you have never connected your device with iTunes but you have iTunes/iCloud backup files, you can recover your deleted data from these backup files.