ISBN: | 978-5-5124-1680-8 |
High Quality Content by WIKIPEDIA articles! The Sony Ericsson Z500a, released in December 2004, is Sony Ericsson`s first major carrier-backed clamshell, released through Cingular Wireless and Dobson Cellular. The phone has push-to-talk walkie-talkie functionality, but the handset was released before Cingular had rolled out their Push to Talk service.