> > Yeah. Does anybody know how the telcos make this determination? > Clearly, they're not assessing live the actual technical > capabilities of the phone, as shown by my experience "your > device is not a mobile phone". Presumably, they're looking up > in some (incomplete) database of phone models. But how do they > make the link between the phone in my hand sending that SMS and > the phone model? Is it via the IMEI, and there's some global > database relating IMEIs to manufacturers' models? Or is somehow > in the handshake between the phone and the network when it first > connects? > > This whole thing has not been thought through well at all. Just > some things that come to mind: > - What if SIMs are swapped among various phones? Is service on > that SIM cancelled if it's temporarily in an "unsupported" > phone? > - What if an Australian SIM is internationally roaming? It > seems nutty to cancel that service because it can't call > Australian 000. (Emergency calling when roaming seems to be a > very messy thing.) > - What about a phone used only, or primarily, for data? Sure, > there are data-only SIMs (in passing: how are they affected by > this regulation?). But often the cheapest way to get data is > just to sign up for a data-competitive phone plan and just > ignore that it can also provide phonecalls. > Admittedly, these issues probably affect only a minority > of phone users, but an important minority, especially for > innovation. > > I believe they just lookup the model from the IMEI. It's not accurate at all and they don't have motivation to fix it.
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