Steve Kennedy wrote:

On Mon, May 22, 2006 at 08:14:19AM -0500, Eric ManxPower Wieling wrote:

If you want to roam between GSM and WiFi while on a call, the GSM carrier is going to have to support it.

There is a protocol for this (UMA), however few operators as yet support
it.
Probably few ever will support it. It isn't in their interests to support it. The people who defined UMA failed to work out a sane business model for it before starting.

T-Mobile offer a webnwalk tarrif (unlimited data access for a fixed
monthly fee), but they are are going to (if not already) block VoIP
calls - they've realised that users are using VoIP (probably Skype) and
not making GSM voice calls - and the voice revenue is declining.
Regards,
Steve

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