- The document discusses how to securely erase personal data from mobile phones before selling or handing them over.
- It provides techniques for both iOS and Android devices, including factory resets, using shredder apps, encryption, and remote wiping via iCloud or Google accounts.
- The key point is that simply deleting data may not remove it completely, and data can still be retrieved by hackers. The document recommends using encryption or shredder apps to completely destroy data.
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