VZW testing Voice over LTE aka VoLTE. Iphone 5 can do VoLTE according to Qualcomm.

Discussion in 'iPhone' started by PacificBeach, Oct 9, 2012.

  1. Vizin, Oct 9, 2012
    Last edited: Feb 28, 2013
  2. gsugolfer macrumors 6502a


    Jul 11, 2010
    Georgia, USA
    No reason they wouldn't allow it once they get everyone on unlimited talk plans ;)
  3. Vizin, Oct 9, 2012
    Last edited: Feb 27, 2013
  4. aneftp macrumors 601

    Jul 28, 2007
    Get ready for tons of dropped calls. VoLTE is all or none.

    One of reasons Verizon was " presumed" to have less dropped calls was CDMA's superior handling of voice compared to ATT's WCDMA voice calls.

    If network is overloaded on WCDMA voice call with drop.

    Similar thing will happen to VoLTE calls. Verizon knows it.
  5. BiggAW macrumors 68030

    Jun 19, 2010
    For whatever reasons, maybe their whole "network" thing, neither has done wifi calling. VoLTE doesn't make it much easier, and we know, at least in AT&T's case on GSM/UMTS, that UMA and it's software-based descendent that T-Mobile now uses, that wifi calling is already very practical.
  6. kvoulgar, Feb 27, 2014
    Last edited: Feb 27, 2014

    kvoulgar macrumors newbie

    Feb 27, 2014
    VoLTE is not simply VoIP

    Actually, Vizin, VoLTE is not simply VoIP. It requires support from the lower layers to improve voice performance and prioritise the voice traffic.

    "plain" VoIP would not offer the same user experience and will be more prone to call drops, particularly at the cell edge, than VoLTE.

    For the above reason, there is a difference between saying that a mobile supports VoIP and that the same mobile supports VoLTE. While all smart phones support VoIP not that many support VoLTE, at the moment.

    It is very likely that mobile operators will not allow non-VoLTE terminals to make and receive calls on the mobile number provided by the operator, using VoIP over LTE. It would be difficult to guarrantee the quality of the call. Instead, they will probably use CSFB for these users. After all, over time there will be increasingly more spare capacity on 2G and 3G.

    Having said that, a VoLTE phone could offer superior performance also for other VoIP services, not necessarily offered by the mobile operator. For that, however, the mobile operator should trust the QoS settings of the VoIP stream and offer the same QoS with VoLTE (QCI 1). In practice, however, I doubt mobile operators will accept to do that and there are many arguments why they wouldn't.

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