1. FAHMI BASSEM's Avatar
    Hello!
    Here's a detailed description of my issue:
    1. 4G works, text works, but not phone calls (receiving neither calling); if someone calls I'm offline for him
    2. After any attempt to call, the connection is either lost -offline- or connected but with lost data download/upload for a minute
    3. Phone calls worked only for once (received)

    Tried switching sim to 2nd tray (dual sim device) with no success; I also tried resetting configuration files with same result

    What could be the problem? What do you suggest?

    Thank you in advanced...
    11-15-2019 04:25 PM
  2. Rukbat's Avatar
    The problem could be the carrier. Bring the phone into them (suggested) or call their tech support number (on another phone).
    Laura Knotek likes this.
    11-15-2019 04:58 PM
  3. B. Diddy's Avatar
    Which phone, and which carrier? Give us the exact brand and model name/number of the phone.
    FAHMI BASSEM likes this.
    11-16-2019 06:26 PM
  4. FAHMI BASSEM's Avatar
    Nokia 9 Ta-1087, Umniah is the carrier.
    11-18-2019 05:38 PM
  5. belodion's Avatar
    Nokia 9 Ta-1087, Umniah is the carrier.
    That's a global model, so ought to work. Did the carrier suggest a replacement SIM? Have you tried using someone else's SIM, or tried your SIM in another phone?
    Laura Knotek and FAHMI BASSEM like this.
    11-18-2019 08:04 PM
  6. B. Diddy's Avatar
    Go to Settings>Mobile Networks, and look for an option for Preferred Network Type. What's selected currently?
    Laura Knotek likes this.
    11-18-2019 08:33 PM
  7. FAHMI BASSEM's Avatar
    I'm having a replacement today, will reply as soon as I try

    Thanks!
    That's a global model, so ought to work. Did the carrier suggest a replacement SIM? Have you tried using someone else's SIM, or tried your SIM in another phone?
    belodion likes this.
    11-22-2019 07:20 AM
  8. FAHMI BASSEM's Avatar
    Set for 4G (Recommended), I also tried manual selection for network, didn't work ,
    Go to Settings>Mobile Networks, and look for an option for Preferred Network Type. What's selected currently?
    11-22-2019 07:21 AM
  9. FAHMI BASSEM's Avatar
    I'm having a replacement today, will reply as soon as I try

    Thanks!
    Nope, the new SIM solution did not work
    11-22-2019 12:30 PM
  10. FAHMI BASSEM's Avatar
    New finding:
    Switched the data to 3G (H+), and everything works perfectly!

    The question is why?

    Thanks...
    11-23-2019 07:32 AM
  11. B. Diddy's Avatar
    Maybe when it's set to 4G, the phone is trying to use 4G for calls as well, but the carrier doesn't support it? Another possible workaround would be to turn off VoLTE on the phone, if it's on.
    FAHMI BASSEM likes this.
    11-23-2019 12:14 PM
  12. Rukbat's Avatar
    Another possibility is that where you are there's only a weak 4G signal, but a strong 3G signal. (There's a separate transmitter for each one, and there may not be any 4G transmitters near you.)
    11-23-2019 04:49 PM
  13. FAHMI BASSEM's Avatar
    Will for look for the Volte option and turn it off, Tha KS for the suggestion!
    11-25-2019 12:39 PM
  14. FAHMI BASSEM's Avatar
    Another possibility is that where you are there's only a weak 4G signal, but a strong 3G signal. (There's a separate transmitter for each one, and there may not be any 4G transmitters near you.)
    Well, my old phone works just fine, same area same operator...

    Thanks for the explanation!
    11-25-2019 12:41 PM
  15. B. Diddy's Avatar
    Will for look for the Volte option and turn it off, Tha KS for the suggestion!
    The option is usually in the Settings>Mobile Networks menu, possibly under Advanced Options.
    FAHMI BASSEM likes this.
    11-25-2019 02:00 PM

Similar Threads

  1. Android 10 (q) Update Schedule for Sony Phones
    By Kavu2 in forum Sony Xperia XZ2 & XZ2 Compact
    Replies: 2
    Last Post: 01-07-2020, 10:07 AM
  2. Phone not logging calls after MIUI 11 update
    By Feljung in forum Xiaomi Android Phones
    Replies: 6
    Last Post: 11-17-2019, 05:02 PM
LINK TO POST COPIED TO CLIPBOARD