[Samsung Galaxy Z Fold3] speedyjay:
Hey all.

First and foremost - I AM NOT RESPONSIBLE FOR BRICKED DEVICES, BY FOLLOWING MY GUIDE, YOU PROCEED AT YOUR OWN RISK.

This is my guide in terms of how i got the beta working on my device, for my UK members who have the F926B. This guide is everything that i done which resulted in a successful flash of OneUI 4.0.

So, for my UK counterparts. I have a brand new Z Fold 3, bought yesterday from O2. Model number F926B/DS (DS isnt relevant here)

In case you're unaware, first and foremost, O2 devices come SIM unlocked meaning, they're not locked to the O2 network.

So, the link in OP does work, except clicking it while using a desktop using Chrome will just spawn another tab and then the tab would disappear immediately. What you need to do, is right click on the link in the OP > copy link address > open a new tab in Chrome yourself > paste and then press enter.

This will download the update file.

Next, you need to download the latest Platform Tools from Google. There are multiple links for this within this thread.

Once you have Platform Tools downloaded, you need to extract it. To do this, i find shoving everything on the desktop is easier because its there, its accessible without noncing around in download files etc.

So, provided Platform Tools are on your desktop, right click > extract files > OK. This will extract the ADB files necessary to install the OneUI beta later. There are multiple files within the Platform Tools file. So, the initial Platform Tools folder that you just successfully extracted on your desktop with have ANOTHER Platform Tools folder within that, drag that to your desktop, therefore you dont have to go through a million different folders to get to the ADB files.

Once your update file has successfully download, provided you're using Chrome, drag it from the download bar at the bottom of your screen to the desktop. Once that's done, move it to the Platform Tools folder.

Now, provided you're still with me, we now need to head over to your phone. On your phone, navigate to settings > about phone > software information > tap "build number" 7 times until you have a message saying "you're now a developer"

Once that's done, head back to the main settings menu and at the bottom, you'll notice you have developer options. Go in there and make sure USB Debugging is checked.

Now connect your phone to your computer using the ORIGINAL cable if possible, otherwise use another cable that came bundled with a Samsung device. We're done with your phone for now.

On your computer, navigate to the Platform Tools folder containing the ADB files and the update file we downloaded earlier.

In the folder address bar (if you're using Windows 11) delete the path that is there, in my case it's C:\Users\djice\Desktop\platform-tools and just type CMD. This will open the folder path within a command prompt. Once command prompt is open, you've checked the folder path WITHIN command prompt says > C:\Users\YOURUSERNAME\Desktop\platform-tools - we're ready to proceed. Windows 10 users can just hold Shift + right click within a blank space in the Platform Tools folder > Open Command Prompt Here.

So, the next part is important!! Unlock your phone to the home screen and then back to your computer. In command prompt, type adb devices, you'll see a message within command prompt that looks like this -

C:\Users\djice\Desktop\platform-tools>adb devices

* daemon not running; starting now at tcp:5037

* daemon started successfully

and on your phone you'll have a pop-up. You MUST allow the connection. Once you've allowed the connection, type adb devices again and you'll see something like this.

C:\Users\djice\Desktop\platform-tools>adb devices

* daemon not running; starting now at tcp:5037

* daemon started successfully

List of devices attached

YOURDEVICESERIAL device

Provided your computer recognises your phone and you see your device serial within command prompt, we're ready to proceed.

Next, type adb reboot recovery - this will force your phone to boot into recovery mode.

Once in recovery, on your phone, using Vol Down to navigate and the power button to select, navigate to Apply Update Using ADB, press the power button to select that option.

Now, on your computer, still using command prompt, type adb sideload and then the first few letters and numbers of the update file you downloaded earlier, then press TAB to complete the auto-fill and then press ENTER.

This will begin sideloading the update file for installation. Then wait for the process to complete. Leave your phone alone while it's updating because any disconnection as a result of a loose USB cord or your cat jumping on your computer and nudging your device on the floor - also resulting in disconnection from your computer, you'll probably have a £1,699 paperweight on your hands which means a trip to the Samsung Service Centre.

Once the installation is complete, congratulations! You're now running Android 12, OneUI 4.0. Albeit, the link from the OP but still OneUI 4.0 nontheless.

Happy flashing!