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Problem with 4G

  1. V1569781415546
    Cupcake Jan 28, 2020

    V1569781415546 , Jan 28, 2020 :
    I have a problem with my OP 7t, mobile networks do not hang on to the network.
    Someone can help me??
     

    #1
  2. Gazouille
    Gingerbread Jan 28, 2020

    Gazouille , Jan 28, 2020 :
    Which country, which network... !

    Make a effort to explain your problem if you expect some help from us ... or don't open a new thread!
    Lazy you!
     

    #2
    V1569781415546 and ngydat like this.
  3. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    i'm in italy, telephone operator is vodafone. I noticed an "!" next to the network symbol. it is not constant, sometimes there is and sometimes not, when it appears I can no longer navigate. it can be a problem of the operator?
     

    #3
  4. ngydat
    KitKat Jan 29, 2020

    ngydat , Jan 29, 2020 :
    Why not asking the operator then ? At least, you'll be sure.
     

    #4
    V1569781415546 likes this.
  5. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    yes,I'll try. I asked to know if anyone had the same problem
     

    #5
  6. GeekOnTheHill
    Honeycomb Jan 29, 2020

    GeekOnTheHill , Jan 29, 2020 :
    It can be many things. The "!" means that the phone does not have a network connection at the moment. Some possible reasons include:

    Provider problem.
    Account problem (excess data use, etc.).
    SIM card problem.
    Loose, dirty, or corroded SIM card slot (very unlikely with a new phone).
    Corrupted or incorrect APN settings.
    DNS provider problem if using custom DNS server.
    No signal due to topography, distance from the nearest tower, or a problem with the tower.
    Device problem (hardware or software).

    When you say you "can no longer navigate," do you mean as in using a navigation app? If so, which one? Some use offline maps and should keep navigating (although without features like traffic data) even when the phone has no network signal, as long as the satellite radios are working. Others download the maps as you navigate, and will either stop navigating completely or show your position on the earth (but without roads) when they have no network connection.

    You can test the satellite radios independently by installing an app like GPS Test and starting it when you have no network signal (when the "!" appears). You should have satellite reception any time you are outdoors with a clear view of the sky, regardless of the network status.

    The first thing I personally would do would be disable Private DNS, if it's enabled, and check the APN settings. Then I would restart the phone and try it for a few days.

    If the problem happened again, I would note the location and check whether the provider has service there. It could just be a dead zone. I also would check the satellite reception using GPS Test in that location to rule out a problem with the satellite radios, since you mentioned that you can't navigate when the network signal is lost.

    If the provider has service in a location where you have no signal, and denies any outage in that area while you were there, then I would request a new SIM card.

    Richard
     

    #6
  7. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    I mean that i can't use any app like Fb, whatsapp , google or any game that use internet.
    how i can verify APN setting?
     

    #7
  8. GeekOnTheHill
    Honeycomb Jan 29, 2020

    GeekOnTheHill , Jan 29, 2020 :
    Settings -> Wi-Fi & internet -> SIM & network -> (Choose active SIM if more than one) -> Access Point Names

    At this point, it differs depending on your provider. You'll need your provider's assistance here to determine the correct settings. Once you have that information:

    Usually one set of settings will be checked, and clicking on that profile will take you to a screen where you can inspect the settings. You'll need to compare them to what your provider specifies.

    If they are incorrect, go back to the previous screen and see if there are any other selectable profiles, and inspect those settings. If they are correct, try selecting that profile.

    There's also a setting in

    Settings -> Wi-Fi & internet -> SIM & network -> (Choose active SIM if more than one)

    to select the Network Operator. "Choose automatically" is the default and is usually correct, but not always.

    Richard
     

    #8
  9. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    Thanks[e]1f601[/e]
     

    #9
  10. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    I've see the settings and are correct , there is other things that i can do??
     

    #10
  11. GeekOnTheHill
    Honeycomb Jan 29, 2020

    GeekOnTheHill , Jan 29, 2020 :
    My next steps would be:

    Restart the phone and try it for a few days, if you haven't already done so.

    If / when the problem happens again, take note of the location, and then check it with the provider's coverage map. It could just be a dead zone where there is no signal, in which case the mystery is solved.

    If the provider does have service in the location(s) where the signal was lost, and denies any outages, then I would ask the provider for a new SIM card. It's not uncommon for them to fail or be defective.

    These are just simple, preliminary troubleshooting steps to avoid leaping to more drastic ones like a factory reset. Better to rule out the simple stuff first.

    Richard
     

    #11
  12. V1569781415546
    Cupcake Jan 29, 2020

    V1569781415546 , Jan 29, 2020 :
    ok thanks
     

    #12