The Bosch CarTel SL2G was released in 1995. In addition to its standard phone functions, it provided an address book memory for storage of up to 100 telephone numbers with associated names with the option of storing additional numbers on the SIM card. The screen could display 2 x 12 characters with additional icons such as signal and battery strength meters. There were a range of call timers provider and the CarTel would both send and receive SMS messages.
Some information courtesy of Nigel Linge & Andy Sutton, the authors of 30 Years of Mobile Phones in the UK