Customer Support

No matter if you’re looking to book an install, need to change your appointment time, or need help with your new ADT-monitored security system, we’re here for you. Just give us a call at (410) 934-3289. Our office hours are Mon-Thu, 9:00 AM - 7:00 PM and weekends 9:00 AM - 5:00 PM.

You can also look at our security FAQs to get answers to our most asked questions.