1. eznoh's Avatar
    I have a couple of Samsung Galaxy S9s with an annoying problem. Mobile data will often not work until I toggle airplane mode. Supposedly this causes the phone to find the strongest signal. I checked with Samsung and they suggested many things to try none of which worked. I'm wondering if an app exists which runs in the background and periodically checks if mobile data is active and if not connects
    03-09-2022 09:42 AM
  2. B. Diddy's Avatar
    Are they both the same model number, and if so which one is it? There are a number of variants for the S9, so if they're variants that don't fully support your carrier's bands, that might be part of the reason.
    03-09-2022 09:44 AM
  3. dov1978's Avatar
    I have a couple of Samsung Galaxy S9s with an annoying problem. Mobile data will often not work until I toggle airplane mode. Supposedly this causes the phone to find the strongest signal. I checked with Samsung and they suggested many things to try none of which worked. I'm wondering if an app exists which runs in the background and periodically checks if mobile data is active and if not connects
    Try this setting in Developer Settings first before using another app
    Attached Thumbnails Mobile Data Keep Alive App-415.jpg  
    B. Diddy likes this.
    03-09-2022 11:14 AM
  4. eznoh's Avatar
    They are different model numbers but both have the problem

    Tried that, did not help
    03-10-2022 05:53 PM
  5. L0n3N1nja's Avatar
    There used to be apps that could toggle data on/off but Google blocked them at some point for "security" reasons.

    I don't know if it's become possible again these days without root.

    By chance are you experiencing these problems near a 5G network? My Verizon Note 20U acts up at work and I need to toggle data or airplane mode occasionally and it only happens here where I switch back and forth between 5G and 4G.
    Laura Knotek likes this.
    03-10-2022 05:59 PM
  6. mustang7757's Avatar
    Tried that, did not help
    What carrier?
    03-10-2022 07:56 PM
  7. eznoh's Avatar
    ATT

    I can easily toggle airplane mode but I'd like to not have to do it. And it happens all over the county
    03-10-2022 10:03 PM
  8. mustang7757's Avatar
    How old your sim?
    Try reset APN ?
    03-10-2022 11:20 PM
  9. eznoh's Avatar
    Bought a new sim. Reset the APN.
    03-10-2022 11:46 PM
  10. mustang7757's Avatar
    03-10-2022 11:47 PM
  11. mustang7757's Avatar
    You have Att version s9 or the Unlocked version? Whats your model number?
    03-10-2022 11:50 PM
  12. dov1978's Avatar
    I've had tonnes of different phones but this has only ever happened to me on Samsung devices. I do a lot of driving at work and when I lost signal/data going from one area to another it wouldn't re-establish the connection automatically. Much of the time it'll show a signal/4G/LTE on the status bar but when you try open anything it says I have no Internet connection. Its even been happening on my new S22 Ultra. I did a factory reset on that last week and also removed my work sim as it's dual Sim and I've not had the issue since. I just wish I knew what had cured it. The factory reset or going back to single Sim 🤷🏻
    03-11-2022 01:33 AM
  13. eznoh's Avatar
    unlocked SM-G96OU1

    Yes

    The only thing I haven't tried is the factory reset
    03-11-2022 08:27 AM
  14. mustang7757's Avatar
    unlocked SM-G96OU1

    Yes

    The only thing I haven't tried is the factory reset
    I would flash it to carrier version SM-G960U I HEARD THAT UNLOCKED dont work on Att because they going away with 3g and such
    Laura Knotek likes this.
    03-11-2022 11:18 AM
  15. mustang7757's Avatar
    03-11-2022 11:20 AM
  16. eznoh's Avatar
    I've given up on this phone. Can anyone recommend a similarly priced replacement (~$500) that will do 5g? One I'm considering is the Motorola Edge.
    03-11-2022 03:18 PM

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