[asterisk-users] Hardphone SIP phone costs

[John Faubion]

> are plenty of phones on the market which do SIP now - most 
> modern Nokias do. I use an E90 Communicator, but the E95 is 
> popular too, so I'm experimenting with using my mobile as my 
> "one" phone, via Wi-Fi/SIP when I'm in the home/office and 

Out of curiosity, how do these phones handle the transition from Wi-Fi to
GSM? Is it seamless? Can the transition occur when on a call? 

Thanks,
John