Hi, I have an S21 Ultra 5G, (SM-G998B)and I have problem about 1 month ago. When I am connected to a wifi network, icons 4g is turn on and mobile data stop work. Only way to turn on mobile data is restart phone. What is the problem? I try everething and hard reset but problem not solved. This happens almost every day once or twice
Not sure I understand....the phone will NOT use mobile data when on Wi-Fi. You can force it by going in developer mode and boost speed by using both, that is not the default though. ("Mobile data always active")
"Mobile data always active" is turn off but 4g icons is active in same time as wifi network. After that I turn off wifi and mobile data not work but 4g icons still turn on.
I found out what the problem. Every time after sharing the mobile network via hotspot, when I go to Sim manager and turn off Sim 2, both icons appear and the mobile internet stops working.
1. Turn on sharing mobile data (from sim 1) via hotspot. (sim1 and sim 2 active)
2. Turn off sharing data via hotspot
3. Connect to any wifi (after connect to wifi, only wifi icons appear)
4. Go to sim manager and turn off sim2.
5. After that, both icons (wifi and mobile data) appear and mobile internet stops working.
Does this happen to others?
Related
i canceled my internet and im using my wifi. everything was working well and suddenly my phone automatically connects to 3g. i go into my commManager and i see it turned on but i didn't turn it on. so i turned it off and tried using my internet with wifi again but suddenly it automatically connected 3g.
how do i stop it from automatically connecting to 3g?
use the app called "nodata"
Hi
I just have purchased a network free (sim free) 7 tab p1000 from the UK.
How do I give the device a name that displays on my wifi router so I know what it is, presently its just shows up a * ?
2nd question.
I first booted device with no network sim in and it asked me about how I want to connect to internet (none, wifi, wifi & 3G).
I put in sim just to check it worked (it did) but then removed sim as I am waiting a new one.
How do I switch off the 3g connection only (not airplane mode) ? (I still want to use wifi)
I can't see any menu option to do this and on my power meter, 48% power is taken by the non existent 3g connection.
thanks
Robin...
I found a strange thing that answered one of my questions.
heres how you disable cellular part of device :-
go to setting, activate flight mode
then go to wifi
turn wifi back on.
it works, no cellular but you still have wifi
now just need an answer on network name showing on my router.
cheers
wifi will still work in airplane mode.. you'll lose bluetooth though in airplane mode..
thanks, i doubt i will need bluetooth much, mainly i will use the device around house so don't want it connecting to mobile network and running up charges and if i take it out with me i want to control when it connects.
any ideas on router name showing up ?
Wi-Fi will not work unless I turn off my mobile data. I didn't have an issue with this prior to the update, is there a fix?
It seems to prefer 3G/4G for the initial connection, but it I turn data off, connect to my router, then turn data back on, everything works fine. The Data ON-OFF widget makes that easy.
You don't have the option checked in WiFi settings that says automatically switch between WiFi and cellular do you?
Sent from my SM-N9005 using Tapatalk
I turned on wifi hotspot to share internet... when i did after a few minutes my 3G went off , now no longer show data mobile conectivity.
restarted phone
enable/ disabled data mobile
nothing works
maybe your data ran out?
Hi:
My S21 Ultra is the T-mobile variant, in the US.
The Wi-Fi advanced setting for "Switch to mobile data" is nonfunctional, because it has no effect when turned on.
I'm hoping that others can verify this problem: When you are connected to a non-functional Wi-Fi signal (e.g., your phone displays an exclamation point (!) next to the Wi-Fi signal strength indicator), your phone should still be able to access the internet by switching to mobile data, when you have this advanced setting turned on.
However, with my phone, I *CANNOT* access the internet when I connect to a non-functional Wi-Fi signal, whether I turn on or turn off the "Switch to mobile data" advanced Wi-Fi setting.
I'm hoping others can confirm the same issue, so we can escalate as a bug that Samsung can fix. Or maybe somehow it's an issue specific to the T-mobile USA variants of the S21 Ultra?
Anyway, I'm guessing most people don't encounter this bug, because usually you are on a functional Wi-Fi signal. But in my situation, I *NEED* to be able to connect to a non-functional Wi-Fi signal, and access data through the mobile/cellular tower connection. The reason is because that's the only way I can update the firmware on my dashcam. My phone connects to the dashcam via Wi-Fi. That works, and the app can view the dashcam etc. But the app also needs a data connection to download a firmware update for the dashcam. But when I'm connected to the dashcam via Wi-Fi, the dashcam does not provide internet. So I'm stuck because the S21 Ultra *WON'T* access the internet when connected to the dashcam via Wi-Fi, because the "Switch to mobile data" setting does not work and is ignored, so the phone has no data connection whenever I connect to my dashcam.
I figure, if T-mobile doesn't allow this, then they should remove the setting as an option. Why include the setting if it's simply ignored and nonfunctional?
There are some added wifi settings in the developer mode like, wifi scan throttling and wifi safe mode, have you looked into these? I don't have any wifi problems on my S21U unlocked phone, not branded.
In my developer options, Wi-Fi safe mode is off, and Wi-Fi scan throttling is on.
But the issue is my phone refuses to connect to cellular data, even though I tell the phone to please connect to cellular data when the Wi-Fi is unreliable.
I'm not sure that the Wi-Fi specific options in developer mode would cause the phone to refuse to connect to cellular data.
Are you able to connect to an unreliable Wi-Fi, and test whether your phone can automatically receive info via cellular data *WHILE* you are still connected to the unreliable Wi-Fi? You can simulate an unreliable Wi-Fi if you have a modem connected to your Wi-Fi router, and turn off the modem but leave the Wi-Fi router powered on with no internet.
Also, can you check your developer setting for "Mobile data always active"? Is that on or off for you? I don't want to turn on that setting, because I want the phone to save battery and turn off mobile data when I'm connected to a reliable Wi-Fi. The notable setting for me is in advanced Wi-Fi, where the phone can "Switch to mobile data *ONLY* when the Wi-Fi is unreliable and doesn't provide data.