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How To Install Stock ROM in Samsung Galaxy S21 Ultra?

How To Install Stock ROM in Samsung Galaxy S21 Ultra?

Here is How To Install Stock ROM on your Samsung Galaxy S21 Ultra? We have shown you the easiest ways to flash the stock firmware on your phone.

Remember Sometimes while rooting or while installing custom or stock ROM, we eventually brick our android phone. There is a solution for this which is provided here on this page “Flashing new stock ROM“.

Samsung Galaxy S21 Ultra Specifications

  • The phone was released on 14th January 2021
  • It comes with a 6.80-inch display with a resolution of 1440×3220 pixels.
  • It packs a quad camera of  108MP + 12MP + 10MP + 10MP with a front camera of 40MP
  • The phone is powered by Samsung Exynos 2100 processor with 12GB RAM and 128GB of storage.
  • Lastly, the phone is powered by a 5000mAh battery and runs on Android 11.

Key Specs

  • Display: 6.8 inches AMOLED (3200 x 1400); 10 to 120Hz
  • CPU: Snapdragon 888
  • RAM: 12GB, 16GB
  • Storage: 128GB, 256GB, 512GB
  • Rear cameras: 108MP wide (f/1.8), 12MP ultra wide (f/2.2), 10MP telephoto (3x zoom, f/2.4), 10MP telephoto (10x zoom, f/4.9), laser AF sensor
  • Front camera: 40MP (f/2.2)
  • Video: 8K 30 fps/4K 60 fps
  • Battery: 5,000 mAh
  • Battery life: 11 hours 25 min (60Hz), 10:07 (adaptive)
  • Wireless: 5G, Wi-Fi 6E, UWB
  • Size: 6.5 x 2.97 x 0.35 inches
  • Weight: 8.08 ounces

Full specifications

What is Stock ROM?

Stock ROM is an operating system developed by smartphone manufacturers to attract users. Every smartphone has its unique interface and features in its stock ROM. It differs from one brand to the next, as each gadget is custom-designed by the maker. It comes pre-installed in your device by the manufacturer when you purchase it. Some companies utilize Google’s stock operating system, while others created a Stock Rom using their own operating system.

If a stock ROM is open-source such as Android, code can be accessed by the developer, edited, recompiled, and re-released for another android or Custom ROM.

Advantages of Stock ROM

  • Your phone warranty will be back.
  • Stock ROM will fix the boot loop problem on Samsung Galaxy S21 Ultra
  • Experience the original Stock Android and free from bloatware
  • Better performance with some functional improvements and smoother operation
  • By installing stock ROM will unroot your Samsung Galaxy S21 Ultra, if it’s previously rooted.
  • You will be able to receive OTA updates.
  • All the bugs within the phone will be fixed.

The disadvantages of using a Stock ROM

  • Performance Issues: The manufacturer of a Stock ROM limits its performance to a bare minimum. Which reduces your device’s performance. As a result, you may experience difficulties when doing higher-level tasks on your device. Playing games with higher graphics settings, for example.
  • Apps come pre-installed: It is the characteristic of Stock ROM that many dislike the most. Pre-installed applications and features from the manufacturer cannot be removed or deleted. This unnecessarily takes up space on your smartphone.

Warning: All the tutorials/ guides shown in this article are not tested for each and every smartphone. As the process of Flashing Stock ROM is almost the same for every Android smartphone.

Infofuge.com is not responsible for loss and damage to your smartphone. Try these methods at your own risk!

Steps to Install Stock Firmware on Samsung Galaxy S21 Ultra?

Below I have shown you two methods to flash Stock firmware on the Samsung Galaxy S21 Ultra smartphone. You can choose any of the shown methods according to your convenience.

Method 1: Flash Stock ROM using Odin Flash tool

You need to first fulfill the below requirements before proceeding to the steps.

Prerequisite

Steps

1. Once you have downloaded the Samsung stock firmware (.zip) for your device. Extract the downloaded firmware Zip file to a convenient file location.

2. Extract the Odin flash tool on the Computer.

3. Open the extracted folder and double click on the Odin3.exe file.

4. Connect the Samsung Galaxy S21 Ultra device to the Computer while it is in Download/ Odin Mode.

Install Stock ROM on Samsung Galaxy S21 Ultra

5. After connecting your device to the PC it will display the ID: COM section light up blue. Also, you will see an Added message under the log section.

samsung galaxy device added odin

6. Click on the AP button and select the firmware file.

Odin flash start on Samsung Galaxy S21 Ultra
7. Under the “Options” menu, make sure Auto Reboot and F.Reset Time are selected.

8. Finally, press the Start button to start the flashing process.

9. When the firmware flashing procedure is finished, you will receive a Green PASS!

Message.

Odin flash pass

10. Congrats! Your Samsung Galaxy S21 Ultra device will automatically Reboot and you can disconnect your device.

Method 2: Flash Stock ROM using TWRP Recovery

1. First, Install TWRP Recovery on Samsung Galaxy S21 Ultra

2. Download Stock Firmware File.

3. Move the Stock Samsung ROM file to your Samsung Galaxy S21 Ultra Internal Storage.

4. Once done, Boot your Samsung Galaxy S21 Ultra to recovery mode by holding the Power Button + Volume Down for 5 seconds.

5. Now, you should see something like this.

TWRP Recovery Page - Samsung Galaxy S21 Ultra

6. Go to Install > Locate the Stock ROM that you have just downloaded.

7. Select the ROM file and “Swipe To Confirm Flash”

8. Wait for a couple of minutes, and once the process completes.

9. Reboot your phone.

10. You have successfully flashed Stock ROM on your Samsung Galaxy S21 Ultra android phone.

Also Read: Unlock Bootloader On Samsung Galaxy S21 Ultra

Common Issues and Solutions while Installing Stock ROM on Samsung Galaxy S21 Ultra

Here are some common issues and their solutions while installing the Stock ROM on your Android device.

Samsung Galaxy S21 Ultra Stucked at boot screen or Bootloop problem

The first time boot after installation of the Stock firmware on your phone is slow. So please wait for more than 5 to 10 minutes. If it doesn’t then try to remove the battery for 60 seconds and then re-insert it. If you are unable to remove the battery then leave your phone idle till it shuts down. Lastly, if nothing works, go into recovery mode and wipe all data.

The Screen shows ‘Update failed’ message

Question: The Progress bar load to the middle process but freeze/stuck and then show me a message ‘update failed’?

Answer: Use the correct Stock ROM applicable for your Samsung Galaxy S21. Use the SD card to create a dload.

My Device Keeps Continuously Auto Restarting

  • Check your case/cover it might be automatically pressing the power button of your device which can lead to auto restart.
  • Your current ROM can be corrupted or damaged which may be causing this issue. You can either install the Stock ROM which is listed above or try any other custom ROM. Here are some of the Best Custom ROMs available for your Samsung Galaxy S21 Ultra.

I’m Not Able to Install any ROM on my device

Please try this guide twice. if the problem still persists then you may leave a comment down below with screenshots, then we can help you to install the stock ROM on your device.

cust fail Samsung Galaxy S21 Ultra

Your device has been powered by another ROM, it will take time to load as it is the first boot for your phone. If the problem still persists then try some other ROM or firmware available for your particular device. Hard Reset your Samsung Galaxy S21 Ultra and then flash again.

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