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Original topic:

S21 Ultra No Network Conection after the last Update

(Topic created on: 20-08-2021 10:25 PM)
Juan greenfield
Pathfinder
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Galaxy S21 Series

 

Hi, I have a S21 Ultra since late January, I had issues in the past but now since the last Update 3 days ago My Mobile Network stopped working, I have an (Ø) symbol not even empty bars, the SIM card works great on other devices, but non SIM card works on this device, I tried reseting the network settings, Wiped cache partition, factory reset, airplane mode on and Off, looks like the antenna stopped working completely, not a single SIM card works on this device.

I have Wifi connection but is not what I bought this phone for, I want network service, is there any other solution I can try?

screenshot-2021-08-20-20-06-35-default.png

7 Solutions


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tploumen
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Galaxy S21 Series

Is it still working for you guys with the update...?

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Hassank
Explorer
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Galaxy S21 Series

as mentioned yesterday, i dont trust SAMSUNG anymore, the connectivity dropped this morning 3 times within 10 mins. i am selling this FFF phone and i am moving to a respectful company that at least reply to the customers complains.

 

i cant believe that we are actually writing on the samsung official community site and nobody ever replied!!!

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tploumen
Voyager
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Galaxy S21 Series

As expected we can now say with 100% certainty that the issue is hardware related. The One UI 4.1 update is not a fix.

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gpaolo79
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Galaxy S21 Series

No, the only thing we can say is that there are probably different causes. For some people it was a software bug and its finally fix with UI 4.1. For others it can be a hardware problem.

I don't understand why you are so determined in claiming that those who had it solved with the new software still have it... 

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tploumen
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Galaxy S21 Series

True but I'm referring to the problem from the topic starter. You may have had a different problem.

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gpaolo79
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Galaxy S21 Series

No, I had exactly that problem and it's gone now. In my case the fact that it was software related was straightforward: 3.1 working, 4.0 not working, back to 3.1 working again, 4.1 working.

Different problems can give similar symptoms, between hardware and software phones are complex. Here it could have even been a software bug that triggered a hardware bug on some model - which is why it was fixed also with hardware replacement. 

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tploumen
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Galaxy S21 Series

Thats cleary software related indeed. But in our case even a downgrade to a lower firmware version didn't work, so our case was cleary hardware related.

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227 REPLIES 227
Mitzzz999
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Galaxy S21 Series
Where did you purchase this device from?
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Juan greenfield
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Galaxy S21 Series

I purchased through a company, sunrise (switzerland), but the sim card works great, called sunrise to see if they can provide a solution, they told me that if I already tried everything the best thing would be to bring my device to Samsung for a repair, that if I have my warranty (plus I have all round insurance) they should fix it without charge because it is a software issue, but I don't know yet, we'll see, in the mean time, im trying to find a solution myself, because I don't want to leave my device for a minimum of 2 weeks to fix this, but if i have no other option, I would have to do that

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Ventor
Samsung Maker ★
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Galaxy S21 Series

@Juan greenfield Hello, you can try to reset the device APNs, go to Settings / Connections / Mobile networks / Access Point Names, the three points at the top right-Reset to default.
Or you can enter these details manually. Contact your provider to ask for the APNs and enter them manually. Greetings.

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Juan greenfield
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Galaxy S21 Series

Already did that like 3 to 5 times and nothing happened, I don't know, Im thinking that maybe the antenna is broken, disconnected or fried for the overheating that sometimes Im experiencing, because everything works great, the the SIM works also on other devices, and here the phone reads the SIM and provider but the signal is with this symbol 🚫

Anonymous User
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Galaxy S21 Series
Have you checked to see if the device has been blacklisted?
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Juan greenfield
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Galaxy S21 Series

Thabks for that Nic, Just did, is clean, both IMEI slots are clean, so thats not the issue 😔, suck having to pay for an expensive device, just to have this type of issues.

Z3R0FkzGvN
First Poster
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Galaxy S21 Series

Mine started tripping after the update. It has to be the updates fault

tploumen
Voyager
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Galaxy S21 Series

What exactly are you experiencing...? I have random 4G disconnects and reconnects (🚫) on my S21 Ultra after the July update . The August update didn't fix my problem. I've already done a factory reset and this didn't fix the problem.

It has nothing to do with my provider, because my SIM is working great in other phones.

Please file an error report with the Samsung Members app.

_Jonno
Voyager
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Galaxy S21 Series
Have the same issue lots of people reporting signal issues lately ....
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