The Ericsson GH 198 and its sister model GF 198 are mobile phones for the GSM 900 network. The main difference between the two models was that the GF had a flip-up cover over the dial pad, leaving the connect and hang up buttons uncovered, enabling you to answer incoming calls without opening the cover (which had a small hole for the microphone), while the GH 198 came without this gimmick and a slightly different keypad layout. There was also a GF 197, released slightly earlier, which had a flat plastic keypad instead of "real" rubber keys.
It was first released in 1992, being the third Ericcson mobile phone for the digital GSM standard and the first portable (as in "fits in your pocket") mobile phone at all.
It was replaced by the GH 337 in 1994.
Although it is unable to send SMS, it is a highly reliable phone with great capabilities when it comes to get connected to the network under difficult circumstances (in the 2nd cellar of a parking garage, for example) due to the fact that the number of base station was less than today when the phone was released. I still got mine in everyday use.