S21 Ultra No Network Conection after the last Update

[Juan greenfield]

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?

 

[Salman A]

Same issue here with my S21 Ultra. Tried soft reset, hard reset, factory reset, Network settings reset and flash the firmware with Odin. No success.

Eventually sent my phone to service center since it's still under warranty, i've been told first its network operator issue cuz they're upgrading the 5G network (obviously it was a lie) and all i have to do is disable Volte calls, did that it worked for sometime then started to disconnect again. went back to then after 2 days gave them the phone for diagnose/troubleshoot, the called me after 3 days telling me that they we're using the phone for 3 days and its working good 🤔. Picked up the phone and it was ok for few hours only, sent it back to service center  yesterday and waiting for it.

[tploumen]

Hi Nalzaabi,

Can't open your video...

[Salman A]

An update to my case!!! Samsung service center admitted that the phone have a problem and it only can be fixed by replacing the main board 😒 

[Piotrek052]

Good for you. Hope it will works. They just keep telling me that sh1t is just my imagination🤦🤦 I was trying everything. For me is like 5 months. 5 months with almost no internet. Since June.  I have buyed Huawei again bcoz samsung is just like sh1t for me again. Overheating at beginning (about 1 month from January) then LTE problems from June and main camera problems from July. And for camera problems I had to give phone for service 2 times. Bcoz they told me at first time (IN AUTHORISED SERVICE POINT) to wait for another software uptade. I was waiting for 2 updates with security. And nothing changed. So they just changed my main camera and oh wait. It worked. But they was telling me at first time "it's normal stuff that I'm not having focus at my camera. And s20 camera was way much better."  🤦🤦🤦🤦

[Rūmøur]

Almost 4 months now and still mo solution to this. Looks like I'd have to ship my phone back. ***** Samsung!!

[tploumen]

What you can try is to flash your S21 Ultra to Android 12 Bèta. There are guides on XDA how to do that. I've read on another forum that this worked for another user.

Please report back if it works.

[Rūmøur]

Would be grateful if you could provide a link to the forum where it worked for another user

[tploumen]

I will have a look if I can find back the link.

[tploumen]

Sorry mate, have been searching but cannot find the post anymore.

I believe I've read it on Reddit or XDA.

[Rūmøur]

Sure. No problem