Signed up for a 3 year contract. After 2.5 years had problems with my phone line and since this is what the system is set up through I tried to contact them with some questions. I was told to call ADT directly and then ADT said I needed to speak with SOS about it. After several unanswered calls and voicemails I faxed my cancellation notice and went with another company. Surprisingly SOS then was able to contact me but mostly with threats, bullying and lies. What can I say other than you do not want to do business with these people.