Abstract: A cellular mobile radiotelephone (CMR 12) which detects and reports security breach conditions is disclosed. The CMR (12) includes a remotely programmable unit (RPU 48) in which alarm parameter data (1200) may be recorded from a remote programming (RP) host (22). An input (54) may be adapted to receive a vehicle alarm system (26) output. When the alarm system activates, a Mode 1 Alarm procedure (1700) is performed. If the alarm indication is deemed genuine, the CMR (12) automatically places a call to a security service (28). When a vehicle ignition signal (52) has just turned "on", a Mode 2 Alarm procedure (1800) is performed. A user is given a period of time, which is established remotely (1214), to enter a disarming code. If the disarming code is not entered in time, a genuine alarm event is assumed, and the CMR (12) places a call to the security service (28). In placing calls to the security service (28), numerous alarm parameters are established remotely.

Abstract: A remotely programmable cellular mobile radiotelephone (CMR 12) is configured to select (1300) a cellular system (14-16) with which to communicate while roaming. The CMR (12) utilizes a default system selection process. The system selected using this default process is identified (1302) and a SID list (1402) is checked to see if the system identification number (SID) of the identified system is on the list (1402). The SID list (1402) is maintained in a current state through remote programming sessions (1500). When the default system's SID is not on the list (1402), CMR (12) operation continues normally. When the default system's SID is on the SID list (1402), the default system selection process is replaced with an alternate system selection process (1316-1322). If a new system selected by the alternate process is not available or if a new system is available but listed on the SID list (1402), then the CMR (12) simulates a no service mode of operation (1332-1338).