1. zorba121223's Avatar
    I've noticed that when I place and probably receive calls (haven't checked) my phone drops from 4g to 3g. Is that normal? I've had full bars on 4g only to drop to 3g when placing a call. Is that the phone or the towers fault?
    12-11-13 10:12 AM
  2. dloewen2's Avatar
    I've seen this question before and if I remember correctly, all phone calls are made over 3g. 4g and LTE are just data.

    Posted via CB10
    12-11-13 10:22 AM
  3. Phill_UK's Avatar
    Voice isn't currently handled over 4G, just data, so a drop to 3G is perfectly normal.
    12-11-13 10:22 AM
  4. zorba121223's Avatar
    Good to know. Now are the "HD" calls on 3g also then? I have yet to see a call as HD but that might just be the towers here.

    Posted via CB10
    12-11-13 12:40 PM
  5. shellguard's Avatar
    HD calls are just G.722 codec enablement on your provider's MSC and support for it in your device.
    Network technology doesn't matter a lot. It will work even on 2G GSM.

    Sent from my BlackBerry Runtime for Android Apps using Tapatalk 2
    12-11-13 01:03 PM
  6. kbz1960's Avatar
    Both people also have to have an HD enabled phone plus I think your carrier has to support it?
    12-11-13 01:27 PM
  7. shellguard's Avatar
    you're right, for sure.
    its end-to-end solution, so 2 devices with HD Voice and support from your operator.
    It could be an issue if you're on different networks.

    Sent from my BlackBerry Runtime for Android Apps using Tapatalk 2
    kbz1960 likes this.
    12-11-13 01:40 PM
  8. tickerguy's Avatar
    That depends on the carrier; whether the phone drops back is entirely up to them. I have had varying results depending on where I am even with the same carrier and also when roaming.
    12-11-13 03:14 PM
  9. shellguard's Avatar
    this has no dependency on carrier.
    at the moment VoLTE (Voice over LTE) is not in wide use because it is still in development.
    if your carrier decided that HSPA+ or DC-HSPA should be counted as 4G network, that's cheating. All these are extentions of UMTS standard which is third generation network and voice calls are connected using CS mode.
    In LTE there is no CS mode, its All-IP network, so your phone have to drop to 3g.

    Sent from my BlackBerry Runtime for Android Apps using Tapatalk 2
    12-11-13 05:05 PM

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