Believe it or not, it is incredibly easy to get personal information off of an old phone even you have reset all settings to manufacturer default settings. Before you donate, sell or get rid of the old phone, erase it permanently to keep your personal data out of the wrong hands. What you need is MobileTrans.
> Erase existing data: Wipe off everything on Android
> Erase deleted data: All deleted data in the smartphone memory
> Any data: Photos, Music, Video, Contacts, Messages, Documents, etc
> Erase all system data and settings
> Erase from Android phone as Samsung, LG, HTC, etc
> All erased files can never be recovered