3G Networks Phasing Out


3G networks are being phased out by major carriers and will stop working as soon as December 31, 2021.

*Images are representative only and actual product may vary.

For our customers with 3G security system communicators, this means your system will no longer work correctly. Now is the time to start upgrading your security system to LTE networks.

Your security system communicates with Duncan Security’s 24/7 monitoring station over the cellular network. If an emergency sets the alarm off, your system will not send the alarm signal to the central monitoring station and the police or other rescue personnel will not be notified to come to help you.


We are offering a current LTE radio installed in your house FOR FREE!

To thank you for your loyalty to our service, we are offering a current LTE radio that we will install in your home AT NO COST, with the renewal of a 3-year security agreement with Duncan Security.


Get new radio for $99 and retain your month to month service.

Purchase a new radio for $99 for continued functionality of your system.

*Offers cannot be combined with other incentives or promotions. Promotion subject to change without prior notice. Applicable taxes extra. Pricing contingent upon auto billing through credit card or ACH. Early termination by subscriber subject to charges of the balance of initial agreement terms.

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