How does the AT&T LTE work?

Discussion in 'iPhone' started by zachnelson, Sep 11, 2012.

  1. zachnelson macrumors 6502a

    Joined:
    Oct 23, 2010
    #1
    AT&T LTE requires a sim, and AT&T GSM requires a sim. Obviously phones have to support both when there isn't LTE available, so how does it work? Do they have two sims?
     
  2. Roessnakhan macrumors 68040

    Roessnakhan

    Joined:
    Sep 16, 2007
    Location:
    ABQ
    #2
    They utilize different antennas and frequencies.
     
  3. Shockwave78 macrumors 65816

    Shockwave78

    Joined:
    Jul 10, 2010
    #3
    Will AT&Ts 4g LTE frequencies penetrate buildings better? Thats pretty much the only reason I left them after 9yrs. Thinking of going back though...
     
  4. zachnelson thread starter macrumors 6502a

    Joined:
    Oct 23, 2010
    #4
    I think you missed my question.

    GSM requires a sim. LTE requires a sim.

    Are they combined into one? or do GSM/LTE phones have two sims or what?
     
  5. scaredpoet macrumors 604

    scaredpoet

    Joined:
    Apr 6, 2007
    #5
    They have one SIM. LTE, 3G, and 2G GSM will all utilize the same SIM on a single phone.

    Saying it's "combined" isn't really accurate, because there's nothing to combine. It's just a single SIM like it's always been, and all three interfaces just use the same one.
     
  6. zachnelson thread starter macrumors 6502a

    Joined:
    Oct 23, 2010
    #6
    Ahh alright. I've been with Verizon forever so never had to use sims. Nice to know thanks!
     
  7. Dmunjal macrumors 65816

    Joined:
    Jun 20, 2010
    #7
    Also, LTE is only used for data. HSPA+ is still used for voice. In fact, you lose LTE data when you're on a call as it drops back to HSPA+. One reason why AT&T LTE is better than Verizon despite the coverage. VoLTE is coming which will run voice over LTE as well.
     

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