After being told by Central Security in Dec. 2012 that they have cellular device for home alarm system that would work if no landline available, I discontinued my landline in early Feb. 2013. Contacted Central Security to get set-up with the cellular system. Took 2 weeks or more to get the specific person (apparently only 1 person could help) on the phone. Was told there was a $200 charge for the device + I had to agree to additional 2 year contract + additonal $12 per month. Was asked to send email agreeing to terms. Through negotiation, the $200 was waived. I sent the email. No one contacted me to set-up installation. After 2 months of waiting I began calling again. Was told someone would get back to me to set-up installation. No one called. Finally in April 2013, I stopped the automatic payments from my checking account. Within 2 weeks someone called to inquire about the payments. I informed them that I had been paying for 3 months with no service, it appeared that they had no device for cellular so they breached contract by not providing the service. Since then I had not heard from anyone by phone. Have only received invoices in the mail for the months since I discontinued the auto payments. These folks are Ripoff artists! They claim to provide services that they do not have! Unbelievable!!