Last Updated: June 2, 2026
Getting your SM-N986N back in working shape is straightforward when you use the official Samsung Galaxy Note20 Ultra 5G SM-N986N firmware. This page provides the exact flash files, USB drivers, and step-by-step instructions you need to handle FRP removal, hard resets, and full system repairs.
Device: Samsung Galaxy Note20 Ultra 5G SM-N986N | Chipset: Qualcomm Snapdragon 865+ SM8250-AB | Flash Tool: Odin
Android: Android 10, upgradable to Android 13, One UI 5 | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware (Flash File) Drivers, Tools & Guide
Flashing your phone with Odin is a simple process once you understand the exact steps. I gathered all the necessary resources right here, including the correct Samsung Galaxy Note20 Ultra 5G SM-N986N firmware build, the matching Odin version, and the exact method to get everything running smoothly.
Before you connect your phone to the computer, make sure to sign out of any active Samsung accounts. Skipping this step often triggers Knox security, leaving you with a KG lock that takes much longer to clear. You should also check your extracted files. Official Samsung packages use the .tar.md5 format, which means you will see specific files labeled AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*) once unzipped. If those files are missing, the package is incorrect for your phone.
Your downloaded Samsung Galaxy Note20 Ultra 5G SM-N986N firmware arrives as a standard ZIP archive. You can unpack it using WinRAR or 7-Zip. Once extracted, verify that you have the AP_*.tar.md5, BL_*.tar.md5, CP_*.tar.md5, and CSC_*.tar.md5 (or HOME_CSC_*.tar.md5) files present. Missing these usually points to a wrong download or an incorrect package for your specific variant.
Remember that installing stock firmware completely wipes your phone storage. This factory reset effect is exactly what fixes persistent software glitches, including FRP locks, system crashes, sluggish interfaces, forgotten passwords, devices frozen on the logo, connectivity bugs, rapid battery drain, and soft brick scenarios.
Hard Reset Samsung Galaxy Note20 Ultra 5G SM-N986N
You can perform a factory reset on the Samsung Galaxy Note20 Ultra 5G SM-N986N without a computer by turning the phone off, then pressing and holding Volume Up + Power together until the recovery screen loads. Navigate the menu using volume keys to highlight “Wipe Data/Factory Reset” and press the Power button to confirm your selection.
Executing a hard reset completely wipes your internal storage and returns the Samsung Galaxy Note20 Ultra 5G SM-N986N to its factory settings. This resolves the majority of software hiccups like system lag, random app closures, lost screen lock pins, and continuous bootloops. If the phone still misbehaves after the reset, the full Odin flash tutorial below will resolve deeper system corruption.
Samsung Galaxy Note20 Ultra 5G SM-N986N FRP Bypass
The most reliable method to bypass FRP on the Samsung Galaxy Note20 Ultra 5G SM-N986N involves using a dedicated Android apps launcher to access device settings during the initial setup screen. You will often encounter this Google account verification after a factory reset or a firmware flash. Our free Android apps launcher provides a quick way to navigate past this lock. This is exactly why removing your Google credentials before flashing is highly recommended, it prevents the lock from triggering in the first place.
Why Do We Need Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware?
Flashing the official Samsung Galaxy Note20 Ultra 5G SM-N986N firmware using Odin repairs software issues regardless of the internal processor. Installing the official software resolves a wide variety of system errors:
- Regain access if the phone is locked or disabled.
- Upgrade the operating system to the newest Android build officially supported for the phone.
- Eliminate system freezing, severe lag, and continuous bootloops on your SM-N986N Galaxy Note20 Ultra 5G.
- Repair failed over-the-air updates and unusual battery drain.
- Revert to the original factory ROM to maintain your warranty status.
- Fix a phone that only boots into the recovery environment.
- Clear KG lock or Knox errors resulting from an interrupted or incorrect software installation.
Read more about stock ROMs and why flashing works.
Choosing the Right Firmware Version
Selecting the correct software build is critical before starting the Odin process. Installing a file meant for another region or model causes severe system errors:
- Identify Your Exact Model Number: Open Settings › About Phone and verify your full model name (for example, SM-N986N). The final letter dictates the region, U/U1 is USA, W is Canada, N is Korea, and B/F is International. Cross-flashing these variants causes major issues.
- Match the CSC (Region): The firmware filename includes a 3-letter region code that must align with your phone. Verify your current CSC under Settings › About Phone › Software Information, or check the Service Provider line in Download Mode. Typical codes include XAA (US), BTU (UK), INS (India), and SER (Russia).
- Check the Binary Level: Inspect your current software version string (for example,
XXU9BZDP, the number directly after the letters is the binary). You cannot downgrade past this number. A phone on Binary 9 requires Binary 9 or higher. - Confirm the Build Date: The final 4 characters of the PDA indicate the build date. The first letter represents the year (A=2024, B=2025, C=2026), and the second represents the month (A=Jan through L=Dec).
- Verify in Download Mode: Power down the phone, then hold Volume Down + Power to access Download Mode. This menu displays your exact model, CSC, and current build number for easy verification.
Firmware Details for Samsung Galaxy Note20 Ultra 5G SM-N986N
Here is a complete breakdown of the official software specifications for this device:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy Note20 Ultra 5G SM-N986N |
| Firmware Version | KSU1ATH1 |
| File Size | 5.5 GB |
| Android Version | Android 10, upgradable to Android 13, One UI 5 |
| Platform | Qualcomm Snapdragon 865+ SM8250-AB |
| Release Date | Released 2020, August 21 |
| Region | Global, Africa and Asia |
| File Type | .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin) |
Which Firmware Version Should I Download?
Selecting the right build depends entirely on the current state of your phone. Use this reference table to match your specific scenario with the correct file:
| Your Situation | What I Recommend |
|---|---|
| Phone is completely dead or stuck on logo | KSU1ATH1, download this one. It is the latest Samsung Galaxy Note20 Ultra 5G SM-N986N firmware available. |
| FRP / Google account lock only | See the FRP bypass guide above, you likely do not need the full firmware for this. |
| Not sure which region/CSC to download | Check Settings › About Phone › Software Information for your current CSC, or enter Download Mode (Volume Down + Power), it shows the CSC on screen. Match the 3-letter code (e.g. XAA, BTU, INS) to the firmware filename. |
| Phone slow after a recent OTA update | Try the next older version, sometimes the latest OTA introduces new bugs and an older build runs better. Make sure the binary level is the same or higher than what your device currently has. |
| IMEI missing after a previous flash | Re-flash KSU1ATH1 first, then follow the IMEI repair guide. Do not skip the reflash. |
| KSU1ATH1 failed with a flash error | Try the next older version instead and double-check your AP/BL/CP/CSC file assignments in Odin before assuming the firmware is the problem. |
| Restoring to factory / warranty repair | KSU1ATH1, clean state, fresh start. |
To tell which Samsung firmware is newer, look at the last 4 characters of the PDA version string (e.g. S938BXXU9CZDP). The first character is the year (A=2024, B=2025, C=2026), the second is the month (A=Jan, B=Feb… L=Dec, Z=final stable), and the last two are the revision (0-9 then A-Z, where Z is highest). But before comparing dates, always check the binary level: the digit just before the date code (e.g. XXU9CZDP = Binary 9). You cannot downgrade to a lower binary level. If your device is on Binary 9, only flash Binary 9 or higher. Also make sure the 3-letter CSC code in the firmware matches your device region.
Download Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware
You can grab the official stock software for the Samsung Galaxy Note20 Ultra 5G SM-N986N right below. The newest available build is KSU1ATH1. After the download finishes, double-check the file size against the specifications listed earlier. A mismatched file size usually indicates an incomplete download, and attempting to flash a broken file creates more system problems.
| Software Details | Download Link | Members Link |
|---|---|---|
|
File Name: N986NKSU1ATH1_N986NOKR1ATH1_KOO_4file.zip Size: 5.5 GB | Download Link | Download Link2 |
Always ensure the software matches your exact hardware model. Review the firmware selection guide above if you are uncertain.
- Your model number is a variant of SM-N986N with a different letter suffix. Check About Phone carefully, one letter difference can cause a failed or broken flash.
- Your chipset differs from Qualcomm Snapdragon 865+ SM8250-AB. Confirm in recovery mode before proceeding.
- You downloaded the file from a source other than this page.
- The file size differs significantly from the sizes listed in the table above, a size mismatch usually means a partial download, which will fail mid-flash.
Prerequisites for Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware
Complete these steps before launching Odin to flash the Samsung Galaxy Note20 Ultra 5G SM-N986N firmware. Two frequent culprits behind flashing errors are active Samsung accounts and poor quality USB cables. An active account often triggers KG lock, while a cheap cable might disconnect during the write process. Always rely on a high-quality data cable for the best results.
- Back Up IMEI Numbers: Dial *#06# on your keypad and record both IMEI digits. Keep these safe in case you need to restore your network connectivity later.
- Remove Google Accounts: Sign out of every Google account to prevent FRP lock from activating.
- Remove Samsung Accounts: Sign out of your Samsung account to bypass KG lock.
- Back Up Your Data: Save your photos, contacts, messages, and files elsewhere. The flashing procedure erases everything on the internal storage.
- Charge Your Device: Ensure the battery is at least 50% full. A sudden power loss during a flash is difficult to fix.
- USB Cable & PC: Connect using a reliable data USB cable and a Windows computer with functional USB ports.
- Install Required Drivers:
How to Install Firmware on Samsung Galaxy Note20 Ultra 5G SM-N986N
We will use Odin to write the software to the phone. Leave “Auto Reboot” and “F. Reset Time” checked inside Odin for the cleanest installation. If you need help picking a version, visit our Odin versions page. Certain older Samsung models respond better to specific Odin releases.
- Download and Extract:
- Save the correct software package from the download links provided.
- Unzip the archive into a simple folder path. Avoid spaces or special characters in the folder name, as they sometimes cause Odin to fail.
- Install the Listed Drivers:
- Ensure all required drivers are installed on your computer. Restart your PC after installation to guarantee they load properly.
- Load the Firmware File:
- Inside Odin, click the “BL” tab and select the BL_*.tar.md5 file. Click “AP” to load the AP_*.tar.md5 file. Do the same for “CP” and “CSC”. Select HOME_CSC to keep your data intact, or use the standard CSC file for a completely clean wipe.
- Connect Your Device:
- Boot into Download Mode: Turn the phone off, then press Volume Down + Power until the warning screen shows up. Press Volume Up to continue into Download Mode.
- Plug the phone into your PC. Odin will display “Added..” in the message box when it recognizes your hardware.
- Start Flashing:
- Hit the “Start” button to write the files.
- Leave the phone completely alone until the process finishes. Unplugging the cable midway is a guaranteed way to brick the device.
- Wait and Reboot:
- Unplug the phone once Odin displays a successful completion message.
- Turn the phone on. The initial startup sequence takes longer than usual, often up to 8 minutes.
Video Guide for Flashing
What to Expect After Flashing Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware
Many users assume something broke when the phone simply needs time to initialize. Here is what perfectly normal behavior looks like after applying the Samsung Galaxy Note20 Ultra 5G SM-N986N firmware:
- How to know the flash was successful: A green “PASS.” message appears in the top-left corner of the Odin interface. Seeing this means the installation finished properly.
- First boot takes 3 to 8 minutes, let the phone sit. The operating system is optimizing applications in the background. Pulling the battery or forcing a restart here causes bootloops.
- The phone will feel warm during first boot, the processor is working hard. The temperature will drop once the setup finishes.
- All your apps are gone, a clean wipe removes everything. Download your apps again from the Play Store. If you backed up to your Google account, the setup wizard will offer to restore your data.
- Dial *#06# immediately after setup to verify your IMEI is intact. Do this before inserting a SIM card. If the screen displays “unknown” or “null”, consult the IMEI repair guide below.
- Be careful when re-adding your Google account, skipping the pre-flash sign-out causes an FRP prompt. Enter your credentials through the initial setup wizard rather than the settings menu.
- Wi-Fi, Bluetooth, and mobile data connect automatically. If mobile data fails, navigate to Settings › SIM and Network and input your carrier APN details manually. Flashing occasionally clears these network profiles.
- Stuck in a bootloop after first boot? Open recovery mode and execute a factory reset from the menu, refer to the hard reset guide above. This clears leftover temporary files causing the conflict.
- Samsung Smart Switch: Once the Samsung Galaxy Note20 Ultra 5G SM-N986N firmware is installed, Smart Switch might suggest extra updates. Allow it to update to ensure you have the newest regional security patches.
Missing IMEI or Corrupt Baseband on Samsung Galaxy Note20 Ultra 5G SM-N986N After Flashing?
A missing IMEI usually means the EFS partition suffered corruption during the write process. The EFS partition houses your network credentials and IMEI data. Keep in mind that writing a fake IMEI is illegal in most regions, so only restore the original digits that came with your phone. Software like ChimeraTool or BFT can fix this. Verify your local regulations before changing network data.
Video Guide: How to repair IMEI
Common Issues When Flashing Samsung Galaxy Note20 Ultra 5G SM-N986N
- Odin Shows “FAIL” Instead of “PASS”:
- This error typically points to a mismatch between the downloaded software and your exact hardware. Verify your model number under Settings › About Phone. A single incorrect letter in the model code breaks the process.
- Samsung Galaxy Note20 Ultra 5G SM-N986N Not Recognized by Odin:
- Reinstall the Samsung USB drivers and ensure the phone is actually in Download Mode. Swap your USB cable for a different one, as Odin is highly sensitive to connection quality.
- KG Lock / Knox Triggered After Flashing:
- This security measure activates if a Samsung account remained logged in prior to flashing, or if unofficial software was applied. Always log out of Samsung accounts beforehand. Clearing an active KG lock usually requires a specialized professional tool.
- Boot Loop After Flashing:
- Open recovery mode by pressing Volume Up + Power, then choose the factory reset option. This wipes out conflicting leftover data from the previous operating system.
Frequently Asked Questions
Q1: Will flashing the Samsung Galaxy Note20 Ultra 5G SM-N986N firmware erase my data?
A: Yes, running this software through Odin resets the phone completely to its factory defaults, including the base settings for Android 10, upgradable to Android 13, One UI 5. Every application, photo, contact, and user account will disappear. Save anything important beforehand, because data recovery is impossible after the installation finishes.
Q2: Is this firmware compatible with other Samsung models?
A: No. This specific package is designed exclusively for the Samsung Galaxy Note20 Ultra 5G SM-N986N utilizing the Qualcomm Snapdragon 865+ SM8250-AB processor. Even another Galaxy Note20 Ultra 5G carrying a different letter at the end of its model name might use entirely different internal hardware. Installing the wrong file causes severe damage. Always verify your exact model number in Settings › About Phone.
Q3: Can I downgrade from KSU1ATH1 to an older firmware version?
A: While sometimes technically possible on Qualcomm processors, rolling back is highly discouraged. Downgrading introduces security vulnerabilities and application instability on Android 10, upgradable to Android 13, One UI 5. If the KSU1ATH1 build gives you trouble, leave a comment detailing the problem, because a safer solution usually exists.
Q4: What should I do if I encounter an FRP lock after flashing?
A: Grab our free Android apps launcher. The FRP lock on the Samsung Galaxy Note20 Ultra 5G SM-N986N turns on whenever a Google account remains signed in before a flash. This is exactly why logging out of your Google account prior to flashing is the best preventative measure.
Q5: Are custom ROM options available for the Samsung Galaxy Note20 Ultra 5G SM-N986N?
A: This article focuses entirely on official Samsung stock software. The availability of custom ROMs for the Samsung Galaxy Note20 Ultra 5G SM-N986N relies on whether developers offer open-source kernel support for the Qualcomm Snapdragon 865+ SM8250-AB. Visit our Custom ROMs page or browse the XDA Developers forum to find specific custom builds.
Q6: My Samsung Galaxy Note20 Ultra 5G SM-N986N is not detected by Odin. What should I do?
A: Start by refreshing your drivers. Reinstall the Samsung USB drivers, reboot your computer, and attempt the connection again. Move the cable to a USB 2.0 port instead of a USB 3.0 port, because Samsung phones communicate more reliably over USB 2.0. Temporarily disable your antivirus software. If the problem persists, drop a comment below with the exact error code, and I will assist you.
Q7: How do I enter recovery mode on my Samsung Galaxy Note20 Ultra 5G SM-N986N?
A: Turn the phone off entirely, then press and hold Volume Up + Power together until the recovery menu loads. If you are using an older Samsung phone with a physical Home button, press Volume Up + Home + Power instead. The recovery menu displays the exact build number for your Samsung Galaxy Note20 Ultra 5G SM-N986N, which helps you confirm your current software version.
Q8: My IMEI shows “unknown” after flashing the Samsung Galaxy Note20 Ultra 5G SM-N986N. Is my phone permanently damaged?
A: No, the situation looks bad but is entirely repairable. Follow the instructions in the IMEI repair guide located in the troubleshooting section above. For Samsung hardware, always check the EFS partition for corruption first. Do not insert a SIM card until the original IMEI is successfully restored.
Q9: How long does it take to flash Samsung Galaxy Note20 Ultra 5G SM-N986N firmware?
A: The actual installation inside Odin requires roughly 3 to 10 minutes, depending on the file size and your USB transfer speeds. The initial reboot after the installation takes an additional 3 to 8 minutes. Never interrupt the phone during either phase. If the Odin progress bar appears frozen, wait a few extra minutes before assuming the process failed.
Final Thoughts on Samsung Galaxy Note20 Ultra 5G SM-N986N Firmware
You now have every piece of information required to safely install the official Samsung Galaxy Note20 Ultra 5G SM-N986N firmware (KSU1ATH1) via Odin. Following these instructions carefully will leave your phone running on a completely fresh and stable operating system.
If you run into an unexpected error message or a specific step fails, leave a comment below. Include the exact error text, your current step, and the troubleshooting methods you already attempted. I read every comment and will help you troubleshoot the issue.
Please share this guide if you found it helpful. Sharing is the easiest way to assist someone else facing the exact same phone issues.
Check out our entire catalog of Samsung firmware downloads for other devices.
Disclaimer: Flashing stock software is done entirely at your own risk. Follow the instructions carefully. I cannot accept responsibility for any hardware or software damage, but I am always available to help you troubleshoot in the comments.
