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?

 

[GoldFire369]

SM-G998BXXU3AUIF

[tploumen]

You don't understand what I mean. SM-G998BXXU3AUIF is you firmware version (software). What I need to know is what your phone hardware version is. As I said, you can only find this on your order receipt or on the box.

[GoldFire369]

I have s21ultra 256. On box and receipt is same g998b

 

[tploumen]

Hmmm I have the 512 Gb version. Do you have one with custom colours...? Mine is Phantom Titanium.

[GoldFire369]

Phantom black regular

[Rūmøur]

Almost 2 months now and still no fix for this. I can't believe this. What even sucks is that i ordered the phone from a chinese third party and so I'd have to ship it back all the way to china to claim my warranty. This really sucks. I thought the October security uodate would fix this but looks like from what you guys are saying it doesn't. Though I'm yet to receive the update. This really sucks. At this point i dont even think one ui 4 beta will fix this issue. Semt an error report to Samsung and it took over two weeks for them to get back to me. Only to tell me that I'd have to send the error report again with more details because they can't tell what my problem is from the screenrecording i sent.

[Rūmøur]

Nope!!!

[tploumen]

In this case, the only thing you could try is to flash Android 12 beta. It's whole new operating system so if your problem was causes by an Android 11 OTA security update this should fix it.

I haven't tried this myself because I have an appointment at an official Samsung Repair Centre by the end of the month.

[Rūmøur]

Android 12 beta isnt yet available for my device. Mine is the s21 ultra 9880 hong kong version.

[tploumen]

You can still flash to Android 12 Beta if you flash the CSC from another country (example the UK or German version). 

Have a look at www.sammobile.com or www.samfw.com for guides how to do this.