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The Sony Ericsson Z500a, released in December 2004, [3] was released through Cingular Wireless [3] and Dobson Cellular. [4] The phone has push-to-talk walkie-talkie functionality, but the handset was released before Cingular had rolled out their Push to Talk service.
A significant advantage of PTT is the ability for a single person to reach an active talk group with a single button press; users don't need to make several telephone calls to coordinate with a group. Push-to-talk cellular calls similarly provide half-duplex communications – while one person transmits, the other(s) receive. This combines the ...
In 2003, Verizon Wireless and Sprint PCS each launched push-to-talk features, with Cingular following in 2005. None have gained significant traction. Nextel and Verizon had entered a legal battle in June 2003 over Verizon's advertising for their push-to-talk feature. The companies reached a settlement in early 2004.
The beginnings of Cingular can be traced all the way back to 1978, when AT&T created Advanced Mobile Phone Service to offer the services we know as today's modern cellular services. That company ...
Sprint Direct Connect Now, based on Qualcomm Inc.'s proven push-to-talk technology platform, effectively extends Sprint's growing push-to-talk franchise - with more than 1 million Sprint Direct ...
The LG CU500 is a mobile phone manufactured by LG and was released in December 2006. It was LG Group's first cell phone in the United States to include HSDPA capability, and also the first cell phone to work with Cingular's HSDPA network. [1] [2] [5] The LG CU500v is a software upgrade to the LG CU500 which supports video calls. [6]