The Nokia 232 was released in 1995 being promoted as both a compact and light mobile phone. It provided one-touch keys for quick dialling, adjustable ring volume, data and fax transmission. The phone was also featured in the 1995 American comedy film Clueless.
Some information courtesy of Nigel Linge & Andy Sutton, the authors of 30 Years of Mobile Phones in the UK (Paid Link)