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You may need to change your serial number for various reasons, including upgrading to a paid version or replacing an already expired license with a new one.

Just open the Trend Micro Mobile Security app and follow the steps below:

  1. Tap .
  2. Choose Settings.
  3. Tap Renew / Activate.
  4. Tap the tap here link.

    how to change serial number

  5. Enter your new serial number, then tap OK.
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