@tsac. Im sure some carriers may try to lock it down but I doubt it. SIP is already a major app on Nexus, android and even Iphone has several apps for that
Its the next essential App. In my opinion it was essential 5 years ago.... why is the world so slow?
I dont know if you looked at sip traffic but the bandwidth used is minimal. Ive watched it on my lan and a sip call is really lite. a few KB's I think the statistic I saw was that 5 sip calls would use the same bandwidth that is currently required for a standard call currently supported on CDMA or GSM.