I had to have my phone company come to redo my phone system because ADT system interfered with my phones. They stopped working also my internet service would not work from the time the ADT system was installed. The people who sold us on this system would not return or answer calls. Then they had the wrong account number to charge through my bank. They now want me to pay them 75% of the 3 year contract off if I cancel. BEWARE DO NOT DEAL WITH THIS COMPANY! read full review »