Guidance

End user devices: factory reset and reprovisioning

Created:  08 Dec 2015
Updated:  31 Jan 2018
Mobile phone worker
The methods described here are not guaranteed data sanitisation methods; they may not completely erase data so it cannot be recovered. For more information about how to sanitise affordably, please refer to the NCSC guidance on Secure sanitisation of storage media.
Guidance for organisations deploying or redeploying mobile devices onto their networks.

This guidance is for organisations deploying or redeploying mobile devices onto their networks. It describes the ways in which individual platforms can be restored from a misconfigured or potentially compromised state to a known-good state, using each platform's native functionality.

For each platform, the most useful restore methods are explained in full, alongside the risks of using them. We then recommend one of the methods to use for the following four common scenarios: 

  • Scenario 1: Sanitising a device believed to be compromised with malware
  • Scenario 2: Preparing a device which has not previously been managed
  • Scenario 3: Reissuing a device to a different user in the same security environment
  • Scenario 4: Sanitising a device for release to lower security domain or sale
  1. Factory reset and reprovisioning for Android devices

    Guidance for organisations deploying or redeploying Android devices onto their networks.

  2. Factory reset and reprovisioning for Windows devices

    Guidance for organisations deploying or redeploying Windows devices onto their networks.

  3. Factory reset and reprovisioning for iOS devices

    Guidance for organisations deploying or redeploying iOS devices onto their networks.

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