Cingular is rolling out its own push to talk service, joining other carriers such as Sprint Nextel to offering that kind of service.

Cingular’s service will cost $10 a month.

The service allows users to set up as many as 30 groups and calls to be placed to as many as 20 people simultaneously.

Also, calls can be converted to regular cellular connections.
Phone numbers for both cellular and push to talk service also remain the same rather than being separate numbers.

The service can be used with two phones, the Samsung d357 and the LG F7200.