Portable cellular telephone and communication system thereof

A communication system with telematic services supplied by telecommunication stations and/or networks, which provides utilization of subscriber terminals for information exchange with said telecommunication stations or networks, comprising a subscriber terminal which includes a portable cellular telephone having a first part comprising interface means for performing subscriber interface functions and a second part comprising transceiver means for transmitting and receiving over a telecommunications cellular telephone network, said second part having sufficient power to transmit over a cellular telephone network, said first part and second part being releasably connected to each other, said first part and second part comprising complementary means for wireless bidirectional communication with each other when separated for transmitting messages initiated by said subscriber at said first part to said second part for further transmission over said cellular telephone network, and for transmitting messages received from said cellular telephone network by said second part to said first part for reception by said subscriber, said first part further comprising means for wireless communication with a further telecommunications network or with a telecommunication station, said first part lacking sufficient power to transmit over a cellular telephone network, said communications system further comprising means for enabling at least one of the telecommunication stations or networks to communicate directly and wireless with said means for wireless communication.