No data sim - ONE Q&A, Help & Troubleshooting

I don't know how this happened but I only remember leaving the data on the whole night, while connected to wifi. And in the morning my phone just says emergency calls only, no data sim. It is still able to detect what sim I have on but I cannot receive or make calls/texts. How do I fix this? Thank you

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Unable To Turn Off Data After Upgraded TL10 To 5.1.1

Unable to turn off data after upgraded TL10 to 5.1.1
Dear all,
I need an urgent help from all experts.
I just upgraded my TL10, and after upgraded the both sim card always show 3g and 2g sign on both sim card. even though i disable my data from phone, they are still showing data sign on both sims. I already turned off the data, but i was at oversea yesterday but i keep receiving a warning SMS from telco saying data on roaming will incur high cost. which i forced to disable the simcard instead of the data.
hope anyone has solved this issue please let me know. thanks
That was my issue too when I first upgraded to LP.
Usually, when you turn on mobile data, you will see 3g, 4g, etc. on your status bar. Anyway, what I did was I went to Settings->More(Wireless and networks)->Mobile Network
Data enabled OFF
Mobile data always on OFF
Data roaming:
Data roaming OFF
Receive MMS messages while roaming OFF
You will still see the 3g/4g sign but you won't be using any mobile data unless you turn it on.

S6 not registered on network etc...

Morning all
We have an issue with my wife's S6(UK, stock up to date software, EE network)
A day ago if she tried to make a call and she just got a message stating 'Not registered on network. She's not getting any incoming calls or text messages either. And not able to use mobile data (wi-fi ok)
Tried all of the normal things, restarts, manually selecting network etc. The only thing that solves the issue is to select 2G only in the network settings, then calls and texts are ok, but obviously mobile data is non existent.
We have been though the troubleshooting with EE on the phone, part of this was to try another SIM which did not solve it, so we know the problem is with the phone.
Also done full factory reset last night, did not help at all.
Any ideas apart from sending it for repair, as EE are telling us?
Not wanting to root or modify in any way that is going to void warranty
Thanks in advance

Help with s8+ roaming connectivity

I am currently in Italy using a Vodafone UK sim card, it's been working perfectly (apart from randomly dropping complete signal periodically) but now it's just completely died, as in it won't find a signal at all to connect to any network let alone data roaming. I have contacted Vodafone who said there's nothing wrong at their end and the worst thing is it was working perfectly till this evening. So now it sometimes says emergency calls only or just the ring with a line through it as it cannot find any signal at all. I have tried doing manual network operator selection and automatic but still nothing... Any ideas? It's a g9550 128/6gb
Update I now have 3g data but it says "no network connection" and I cannot send receive texts or phone calls, yet I have full data...
@nugget123
Consequences of buying a CN/HK variant....
They usually have network connectivity issues, not surprising. Try removing the SIM card, turning the phone off, wiping cache in recovery, insert the SIM card, and then reboot. Then manually go and search for a network in settings and force it to connect to Vodafone Italy, should work.
It's working now again, I didn't do anything lol it just started working on its own accord! I'm now in Switzerland and all is good. My life is empty without my phone
It always happens to me when abroad. I am on O2. I have to select network manually and pickup different to the one which auto connect shows emergency calls only. Looks like some cells allowing me to connect but won't pass through calls
Do you also have a usa/china variant?
No, o2 UK from Samsung

Dual sim not working as wanted

Hello,
I use dual sim, one for job calls and second for private calls and data. I have noticed that I cant receive calls on job sim which does not have data enabled. Calls go directly to voice mail and I dont get any alarm.
I have also noticed that job sim works properly when it is set to 2g. However 2g setting always resets back to 4g after reboot.
Is there any way to force second sim to be only in 2g for calls even after reboot? I have rooted device.
Thank you
Athum said:
Hello,
I use dual sim, one for job calls and second for private calls and data. I have noticed that I cant receive calls on job sim which does not have data enabled. Calls go directly to voice mail and I dont get any alarm.
I have also noticed that job sim works properly when it is set to 2g. However 2g setting always resets back to 4g after reboot.
Is there any way to force second sim to be only in 2g for calls even after reboot? I have rooted device.
Thank you
Click to expand...
Click to collapse
Because it is trying to use VoLTE which is using data and you don't have data enabled

Samsung A51 disconnects from cellular network

Hi
I'm having a strange problem with my new A51, with two SIM cards in it.
After an indeterminate time the phone disconnects from cellular network.
It still shows on to the both cards the signal strength, but the phone no longer receives calls or has internet access throw cellular network.
And if I call any of the SIM card numbers from another phone, I get a network message saying the phone is disconnected.
All other functions on the phone seams to be ok. Turning wifi on and off has no effect in reconnecting to the cellular network.
But... If I try to call from A51 to any other number, the phone reregisters on cell network, the call is done and from that point on, all goes to normal. I can receive calls again and access the internet using the cellular network...
I went to the store were I bought it, and the gave me another one, but with the exact same problem.
So I believe is not a hardware problem.
I believe now that It could be a SIM problem, on one or both SIMS, which is odd
A software problem on A51 the need's to be patched, which is odd because it has effect on the most basic feature of the phone, which is receiving calls...
A strange behavior of the phone with my cellular service provider, which is odd too...
I'm trying now with only one SIM to see if the problems happens too...
Can any one suggest any other test or debug to try to clarify this issue ?
Thanks
antoniomch said:
Hi
I'm having a strange problem with my new A51, with two SIM cards in it.
After an indeterminate time the phone disconnects from cellular network.
It still shows on to the both cards the signal strength, but the phone no longer receives calls or has internet access throw cellular network.
And if I call any of the SIM card numbers from another phone, I get a network message saying the phone is disconnected.
All other functions on the phone seams to be ok. Turning wifi on and off has no effect in reconnecting to the cellular network.
But... If I try to call from A51 to any other number, the phone reregisters on cell network, the call is done and from that point on, all goes to normal. I can receive calls again and access the internet using the cellular network...
I went to the store were I bought it, and the gave me another one, but with the exact same problem.
So I believe is not a hardware problem.
I believe now that It could be a SIM problem, on one or both SIMS, which is odd
A software problem on A51 the need's to be patched, which is odd because it has effect on the most basic feature of the phone, which is receiving calls...
A strange behavior of the phone with my cellular service provider, which is odd too...
I'm trying now with only one SIM to see if the problems happens too...
Can any one suggest any other test or debug to try to clarify this issue ?
Thanks
Click to expand...
Click to collapse
My wife have exact same issue with single sim.

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