FW: [Asterisk-Users] WiFi / GSM VoIP Handsets..

[Julio Arruda]

Peter Bowyer wrote:
> On 22/05/06, Steve Kennedy <steve-asterisk at gbnet.net> 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.
>>
>> 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.
> 
> 
> They block VoIP and IM, supposedly to protect their users from a poor
> quality experience. Of course, it's really to protect their voice and
> SMS revenues.

 From what I understand, T-Mobile UK just announced they would block 
VOIP earlier this month, but that is quite recent, and I don't recall 
seeing this 'globally' announced.