Abstract: A smoke detector unit with built-in global system for mobile communications (GSM) to effect short message service (SMS) with an end user, and short message service (SMS), data transmission or email, with a central station monitoring (CSM) Events such as low battery condition and excessive smoke detection are reported to the CSM or end user via SMS or email. The unit may be reprogrammed via SMS remotely. The unit may be checked for connectivity between the unit and the CSM or end user via SMS remotely.