How do I update an existing alarm system?

Changing the 2G radio is not a do-it-yourself activity. ADT requires the upgrade be performed by an ADT service technician . Please call the number on the letter/email communication you received to begin updating your system. If you did not receive an email or a letter or cannot find it, please call 1.800.

4 Ways to Upgrade Your Existing Home Security Systems

To begin upgrading the ADT system or your service, call the residential or business service number on our Contact ADT page .