Samsung has pushed the One UI 3.0 update based on Android 11 for its Samsung Galaxy S10 series device. Many people are complaining about the update and didn’t like the new update. If you are one of them who didn’t like the Android 11 based One UI 3.0 update then this article is for you. In this article, we give you the step-by-step guide to downgrade your Samsung Galaxy S10 device to One UI 2.5 based on Android 10 from One UI 3.0 based on Android 11.
We will say this is something that we generally do not recommend because you are giving up some usually important security updates if you downgrade to the older version of the OS. However again we understand that some people are adamantly against the Android 11 update. They have loath everything about it since they installed it, many people have regretted installing it so as a solution to those users we are going to be offering this downgrade tutorial.
So, to begin we’re going to need to have some things set up ahead of time. First, you are going to need to download the firmware that you are going to downgrade to. There are many websites to download the Samsung firmware for your device. However, we recommend downloading it from a website called Samfw.com as we have used this website to download the firmware for our device. You will also find the archive updates or the older updates of firmware here.
Open the website and search the firmware by typing your device model number in the search bar. You can find the model number of your device on the about phone page in the settings application. Make sure to download the firmware that matches the model number of your device. Once you type the model number of your device in the search box, it should give you the search suggestions so that you can just tap on it to find the firmware.
On the next page, you will see a lot of country codes, type in your current CSC code in the search box. Your country will appear, tap on it and you will get the list of the available firmware files that the website has for your device.
You can also filter between different versions of Android. Choose Android 10 from the list as we are downgrading to that version. Scroll down the page and tap on the firmware that you want to download for your device. You will find the four ways of downloading the firmware file. We have used the second option “Download on Website” to download the firmware. You have to download the firmware using a PC or laptop.
Now, you are also going to need to have the latest version of ODIN downloaded and extracted on your computer and we’re going to need to have a USB cable with a PC/laptop. So that we can connect our phone to the PC while we are in download mode. To boot your device into download mode, power off your device completely. Then connect it with your PC and press and hold the Bixby button and volume down button for a few seconds.
Once you see the devices booted into a blue splash screen, we’re going to simply press the volume up button, not a long press just a regular volume up button press to bypass that screen and then get us into download mode. As we have the Samsung Galaxy S10 in download mode, we can continue with the downgrade process by opening up ODIN.
We are going to need to have the firmware that we want to downgrade to. Download the firmware file and extract the firmware on your PC as it is the zip file. When you extracted the contents of that firmware file you will get five files. These files are an “AP” file, a “BL” file, a” CP” file a “CSC” file, and then a “Home_CSC” file.
We are going to be using the first four files that we extracted and loading them into ODIN. So, our Samsung Galaxy S10 is connected to the pc with a USB cable while it is in download mode, and should give you an “added” message at the bottom of the log window in ODIN. Now, we are just going to start loading the firmware file that we extracted.
In ODIN click on the “BL” button, it will open the file explorer. Choose the folder where you extracted the firmware file and select the file that starts with the “B” name. Then we are going to click the “CP” button and select the file that starts with the “CP” name from the extracted firmware file.
Next, we are going to click the “CSC” button and then choose the file that starts with the “CSC” name. Lastly, we are going to click the “AP” button and select the file that starts with the “AP” name. We chose the file with the “AP” name because it is a bigger file. The sequence doesn’t matter when you load these firmware files in ODIN.
When we load that “AP” file into ODIN it will take a few seconds for ODIN to load that file because it is a bigger file. Once we have all four files loaded into ODIN, click the start button at the bottom to continue the process.
Now be aware that downgrading to Android 10 is going to wipe all the data you have on your device so back up all important information before you click the start button. When you are ready though just go ahead and click the start button.
You can follow along with what ODIN is flashing or installing onto your Samsung Galaxy S10. You can see it is sending the bin files at first from the log on the right side. It is not sending the files to the phone but it’s also copying the contents of these files onto the partitions of Android.
After it finishes up the bin files it then moves on to some image files and while this is all happening, you just need to be patient. Don’t tinker with the phone as it may interrupt the process.
Make sure to keep the connection solid between your device and the PC through the USB Cable for a couple of minutes while ODIN flashes the firmware. What we going to look for is a green pass message right at the top of the progress bar and no error messages in the log.
When we got the green pass message at the top our Samsung Galaxy S10 rebooted on its own and we received a successful one message right at the bottom of the log. Your device will go through the regular boot-up process.
Once all of that is done and the phone is rebooting on its own then you can unplug the USB cable because that connection is no longer needed. Just be patient again because this boot process is going to take a little bit longer than normal the first time. Remember Android just got reset and has to set some things back up.
You should instantly be taken to the Android activation screen when the phone boots up. Set the device just like the normal Android device. That it. You have been downgraded to One UI 2.5 based on Android 10 from One UI 3.0. You can check the version number of One UI and Android by going into the About phone page in the settings app.
This is the entire process of how to downgrade the Samsung Galaxy S10 and other devices in the series from Android 11 to Android 10 with ODIN.
Experiencing difficulties with your Device, check out our “How To” page on how to resolve some of these issue