1. Parman7172's Avatar
    why do carriers not allow all phones the ability to run on their network, and why wouldnt a phone company build phones that are capable of running on all networks? Seems like an open network and an excellent phone could dominate. Why not?
    Just curious about this, Par
    Jay Sacks likes this.
    09-19-2017 05:35 PM
  2. anon(238680)'s Avatar
    why do carriers not allow all phones the ability to run on their network
    Because a technology was chosen when that network was planned and constructed and its not compatible with all phones today.


    and why wouldnt a phone company build phones
    Totally separate technology from being a carrier.


    Why not?
    Billions of dollars in cost to pretty much duplicate what's out there now. Project Fi maybe excluded.
    09-19-2017 06:23 PM
  3. Parman7172's Avatar
    I wasnt talking about changing a network, just designing phones capable of working on most networks.
    09-20-2017 05:37 PM
  4. chanchan05's Avatar
    I wasnt talking about changing a network, just designing phones capable of working on most networks.
    I really don't understand the US either. I mean since the rest of the world is GSM, we can change SIM anytime.
    09-20-2017 06:42 PM
  5. Rukbat's Avatar
    Some of the newer phones can operate on CDMA and GSM, but most of them come in a CDMA version and a GSM version. (@chanchan05, that's a leftover from back when we split the single telephone company into a bunch of separate companies - Verizon decided to use CDMA when they entered the cellphone industry. Sprint came along later and chose CDMA.)

    It wouldbe possible to make a single phone capable of both CDMA and GSM, on all 4GLTE bands, but it would be a bit expensive, so most phones are made for the North American, South American, European, Asian or African market, to limit the number of radios they have to cram into a single phone. (Some do have all bands, though, and can be opened by the user [in software] so they can use all bands.)
    09-21-2017 12:21 PM

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