Yup, and googlevoice supports that as well with its android app.
On a sidenote, I remember us working on MobileIP back in my days working in cellular (2000/2001) so we could bind one IP to a device and let it wander from network to network, there's certainly a lot of the necessary infrastructure to support identity-roaming/prescence in the existing phone system. There's just not enough of a financial incentive to do so yet.
remember, it took an act of Congress, to force the telco's to migrate your existing phone number from one carrier to another.. They gave a lot of technical bullshit reasons why they couldn't for years until eventually government just demanded they did.. suddenly it works now without any 'reimagining of the phone network'
When it comes to telephony.. customer demand doesn't matter squat.. until they're actually losing customers to a competitor who offers that service...
Qwest has been doing a version of 'prescence' between your mobile and landline accounts for a while.. user-friendliness ensured that only dedicated business users really made use of it though (IIRC)
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On a sidenote, I remember us working on MobileIP back in my days working in cellular (2000/2001) so we could bind one IP to a device and let it wander from network to network, there's certainly a lot of the necessary infrastructure to support identity-roaming/prescence in the existing phone system. There's just not enough of a financial incentive to do so yet.
remember, it took an act of Congress, to force the telco's to migrate your existing phone number from one carrier to another.. They gave a lot of technical bullshit reasons why they couldn't for years until eventually government just demanded they did.. suddenly it works now without any 'reimagining of the phone network'
When it comes to telephony.. customer demand doesn't matter squat.. until they're actually losing customers to a competitor who offers that service...
Qwest has been doing a version of 'prescence' between your mobile and landline accounts for a while.. user-friendliness ensured that only dedicated business users really made use of it though (IIRC)