is currently only manufactured by LG Electronics, although early models were made by Hughes for Gen 1, Delphi for Gen 2, and Motorola for Gen 4 to Gen 6. Analog The Gen 1 to Gen 4 models were analog. All were for Class 2 bus. Gen 5 models were a transition period. Some Gen 5 models actually contained both analog and digital cellular phone modules. Also, there were both Class 2 and CAN bus models. Digital The Gen 6 and up models are CDMA digital. Some were Class 2 bus and some were CAN (Controller Area Network) bus. Compatibility Some Gen 5 and Gen 6 models were compatible with each other providing some upgrades to some customers to digital. Analog cellular was turned off in February 2008. Customers who had the Gen 1 through Gen 4 models were unable to upgrade to the digital Gen 6. There is no compatibility in Gen 1 and 4 with other models, while there is some compatibility with Gen 2 and Gen 2.6 (Delphi TCU and Motorola cellular transceiver). OnStar FMV (For My Vehicle) In 2011, OnStar introduced the OnStar FMV system. The system, which embedded both the OnStar system, as well as Bluetooth hands-free connectivity, into an automatically dimming rear view mirror that replaced the existing rear view mirror in nearly any vehicle that was not equipped from the factory with the OnStar system. The system was able to provide all of the features of OnStar, except for those services which required integration of the vehicle's computer (such as Stolen Vehicle Slowdown and Automatic Airbag Deployment Notification). Instead, the system included sensors that detected irregular movement of the mirror and triggered a call to the OnStar emergency response center. Wireless service was provided through Verizon Wireless. The system was compatible with most vehicles manufactured from model year 2000 to 2014, as long as the vehicle was not equipped from the factory with the OnStar system, however, OnStar noted that the system "should not be installed in vehicles such as the Jeep Wrangler, Toyota FJ Cruiser, Hummer, Recreational Vehicle (RV's), or Semi Truck" due to the "extreme windshield angles and/or excessive size" and therefore had the "inability to detect a crash". Professional installation from an OnStar FMV retailer, such as select automotive dealerships and electronic retailers (such as Best Buy), was recommended. An annual OnStar subscription for the FMV cost US$299.00. On March 3,