My local Cell Carrier offers Motorola's POC (PTT Over Cellular) and carries just a few Motorola mobiles with PTT enabled (only motorola). Nokia offers a downloadable software that enables the phone to connect to the carrier's POC network using GPRS. The problem is that I don't know how to extract the configuration parameters from my existing Motorola mobile so I can configure my Nokia mobile's POC software with them.
The software I'm talking about is readily available at the Nokia website, and all I have read tells me it should work on my carrier's POC network. Once again, my problem is the config options, like:
Nickname
Access Point (I assume this should be my regular GPRS setup)
Server Address
username
ptt password
realm.
These all sound like SIP parameters, but my Motorola mobile won't show them to me, and it would seem my provider is using no username/pwd authentication. Your help would be greatly appreciated, Motorola mobiles with PTT offered here are horrendous. 
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The boy's in Vegas would say your trying to make your point the hard way. Just get a handset with ppt and add it as a feature.