Customer FAQs Discover answers to the most frequently asked questions from ADT customers with the click of a button. What is ADT's Quality Service Plan (QSP)? To help protect you against the cost of unexpected service calls on your home security system, ADT offers extended limited warranty protection, called our Quality Service Plan, or QSP. While ADT's sophisticated electronic technology is designed to meet the highest standards, no manufactured equipment is 100% perfect. QSP adds the additional coverage you may need. To request this protection plan, please call the residential or business service number located on our Contact ADT page to speak with an ADT representative.