“When setting up the security system, I somehow managed to lose or delete the Device number. Because of that, I am not able to Log In to the system. Can anyone provide the device number that the Defender model number 21360 uses for it's system?”

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• these are questions for the manufacturer or vendor, like Best Buy.. CALL them and then post the answer for the others, please... thank u

  Answered by MKal 8 years ago

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• Great question Yogi. The default Device ID on the login screen is 000000. If this doesn't work, please contact us directly for further assistance.

  Answered by Defender Customer Support 8 years ago

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