1. BenjaminRo's Avatar
    Does anybody know how to fix this? Like with an app or a Android O/S update?
    02-07-2019 01:02 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! I moved this from the Note 4 forum to the J Series forum.

    Which carrier are you on? In order to have simultaneous voice and data, VoLTE has to be supported (and although this is supported by Verizon, AT&T, and T-Mobile, I believe Sprint still hasn't completely rolled it out in the US).
    02-07-2019 02:49 PM
  3. BenjaminRo's Avatar
    Thanks. You're welcome. I'm a O² subscriber. Is it a cellphone problem with the multiplexing J3 (2016) or is the problem on the side of the telephone company?
    02-07-2019 03:05 PM
  4. B. Diddy's Avatar
    Did you get your phone from O2, or did you bring it to O2 from somewhere else?

    Look in the Settings>Mobile Networks menu and look for an option for VoLTE. It might be called various things, like Enhanced 4G, Advanced Calling, HD Voice, or others.
    02-07-2019 03:17 PM
  5. BenjaminRo's Avatar
    I bought it from Amazon and subscribed to O² later. All I have in it is 2G, 2G&3G, LTE/3G. Can I activate the extra feature somehow?
    02-07-2019 03:26 PM
  6. B. Diddy's Avatar
    That's not the menu option I'm thinking of -- it sounds like you're looking at the Preferred Network Type option. If you can't find the option I suggested, then the phone's firmware probably doesn't support VoLTE.
    02-07-2019 05:20 PM
  7. BenjaminRo's Avatar
    02-08-2019 04:47 AM

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