From Aiseesoft Studio
The most important thing to deal with an old iPhone is to erase the signs of use. You should just delete your contacts, text messages, password or other secret information from iPhone. While those erased data can be recovered by certain tools. However, if the data are deleted by FoneEraser, they will never be back again. The only thing FoneEraser can do and will do is to clear the signs of use in your device. With this powerful software, you can remove all data from your iPhone or iPad completely and choose the erasing level as you like. Plus, you can remove contacts or passcode from your iPhone and iPad at the same time, which will save you much time.
1. Erase all kinds of data on the iOS device
Not one left. Aiseesoft FoneEraser is responsible to clear your device and erase any data on it. No matter what they are, text (Text messages, Notes, Reminder, etc.), media (Music, Videos, pictures, etc.), or trails (Call history, Passcode, Apps, iCloud, etc.), it will wipe them out completely.
2. Optional erasing level
Three erasing levels can be chosen. They are Low level, Medium level and High level. At the Low level, FoneEraser will overwrite all data once on device. And at the Medium level, the software will overwrite all data twice. Successively,
1GHz Intel/AMD CPU or above, 512MB RAM or more.