Last Updated: June 28, 2026
This guide provides the official Samsung Galaxy Core Prime SM-S820L firmware to fix boot issues, bypass FRP locks, or restore a device to a clean state. The page includes the necessary drivers, tools, and step-by-step instructions to perform a standard flash or a factory reset.
Device: Samsung Galaxy Core Prime SM-S820L | Chipset: Qualcomm MSM8916 Snapdragon 410 | Flash Tool: Odin
Android: Android 4.4.4 (KitKat), upgradable to 5.1.1 (Lollipop) | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Device: Samsung Galaxy Core Prime SM-S820L (Qualcomm MSM8916 Snapdragon 410)
Flash Tool: Odin
Latest Build: S820LUDU4AOH1
Firmware Files: 1 available
What You Need: Windows PC, USB data cable, Odin, USB drivers
Time Required: 10-20 minutes (plus 3-8 min first boot)
Samsung Galaxy Core Prime SM-S820L Firmware (Flash File) Drivers, Tools & Guide
Installing official firmware on the Samsung Galaxy Core Prime SM-S820L involves a few specific steps, but the process is manageable. This page contains the correct firmware file for the device, the necessary Odin version, and the instructions to complete the installation successfully.
Before you begin, check if a Samsung account is signed in on the device. If it is, sign it out now. If you skip this step, the Knox security flag will trigger after flashing, which adds an extra step to fix. Samsung firmware comes in a multi-part format. After extracting the ZIP file, you should see files named AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*). If you see these files, you have the right package. If not, you have the wrong firmware for the Samsung Galaxy Core Prime SM-S820L.
There is currently one firmware build available for the Samsung Galaxy Core Prime SM-S820L. This is the stock ROM you should use for unbricking, recovery, or a clean reflash. The firmware supports Android 4.4.4 (KitKat) and can be upgraded to 5.1.1 (Lollipop). The device uses a Qualcomm MSM8916 Snapdragon 410 processor, which requires Qualcomm Flash Image Loader (QFIL) and Qualcomm HS-USB drivers. Ensure you install the correct driver package before connecting the phone to the computer.
The Samsung Galaxy Core Prime SM-S820L was released in 2014. This page is updated with the latest firmware builds as they become available. Samsung firmware uses a multi-file system (AP, BL, CP, CSC) designed for Odin-based flashing, which is different from single-file scatter-based tools.
The firmware for the Samsung Galaxy Core Prime SM-S820L comes as a compressed ZIP file. Download and extract it using WinRAR or 7-Zip. After extraction, you should see files named like AP_*.tar.md5, BL_*.tar.md5, CP_*.tar.md5, and CSC_*.tar.md5 (or HOME_CSC_*.tar.md5). If you do not see these files, you may have the wrong firmware package for your device.
A full flash will erase all data on the device, including apps, accounts, photos, and settings. This is the goal, as it provides a clean slate and resolves issues like screen locks, FRP prompts, bootloops, sluggish performance, and connectivity problems.
Reset Samsung Galaxy Core Prime SM-S820L From Recovery Mode
To perform a factory reset on the Samsung Galaxy Core Prime SM-S820L without a computer, power off the device completely, then hold Volume Up + Power at the same time until the recovery menu appears. For older models with a physical Home button, hold Volume Up + Home + Power instead. Use the volume keys to navigate to “Wipe Data/Factory Reset” and confirm with the Power button.
A hard reset erases all data and restores the Samsung Galaxy Core Prime SM-S820L to its original factory state. This fixes most software problems, including slow performance, app crashes, forgotten screen locks, and bootloops. If the problem persists after a factory reset, a full firmware flash using Odin is covered in the following sections.
Samsung Galaxy Core Prime SM-S820L Google Account Bypass After Reset
A common issue after flashing is the Google account lock (FRP). The fastest way to bypass this on the Samsung Galaxy Core Prime SM-S820L is to use a free Android apps launcher that lets you access settings during the setup wizard. After flashing or performing a factory reset you may see a Google account lock. Our free Android apps launcher is the quickest way to get past it. This is also why I always recommend removing your Google account before flashing, it avoids this problem entirely.
When Should You Flash Samsung Galaxy Core Prime SM-S820L?
You should use official firmware on the Samsung Galaxy Core Prime SM-S820L when software issues prevent normal use. Whether you are dealing with a boot issue or a software problem, flashing the official firmware can resolve it:
- Resolve touchscreen responsiveness issues caused by a corrupted system build.
- Recover your device when it only boots into recovery mode.
- Restore system apps that were accidentally removed or corrupted.
- Update to the latest Android version supported by your phone.
- Fix startup loops, lagging, and freezing on your device.
- Remove persistent malware or adware that survives a factory reset.
- Recover from KG lock or Knox-related issues after an incorrect or interrupted flash on your device.
Learn more about stock ROMs and why flashing works.
Which Firmware Version Does Your Samsung Galaxy Core Prime SM-S820L Need?
The most common mistake is installing firmware meant for a different variant of the Samsung Galaxy Core Prime SM-S820L. Before downloading anything, verify your exact device identity:
- Identify Your Exact Model Number: Go to Settings › About Phone and note your full model number (e.g. SM-S820L). The letter suffix matters, U/U1 = USA, W = Canada, N = Korea, B/F = International/Global. Flashing firmware built for a different variant can cause issues.
- Match the CSC (Region): The 3-letter region code in the firmware filename must match your device. Check Settings › About Phone › Software Information for your current CSC, or look at the Service Provider line in Download Mode. Common codes: XAA (US), BTU (UK), INS (India), SER (Russia).
- Check the Binary Level: Look at the version string in your current firmware (e.g.
XXU9BZDP, the number after the letters is the binary level). You cannot downgrade to a lower binary level. If your device is on Binary 9, only flash Binary 9 or higher firmware. - Confirm the Build Date: The last 4 characters of the PDA version encode the build date, first character is the year (A=2024, B=2025, C=2026), second is the month (A=Jan through L=Dec).
- Verify in Download Mode: Power off, hold Volume Down + Power to enter Download Mode. This screen shows your exact model, CSC, and current firmware version, use this to confirm before flashing.
Firmware Details for Samsung Galaxy Core Prime SM-S820L
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy Core Prime SM-S820L |
| Firmware Version | S820LUDU4AOH1 |
| File Size | 792.28 MB |
| Android Version | Android 4.4.4 (KitKat), upgradable to 5.1.1 (Lollipop) |
| Platform | Qualcomm MSM8916 Snapdragon 410 |
| Release Date | Released 2014, November |
| Region | SM |
| File Type | .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin) |
Which Firmware Version Should I Download?
This is the question I get asked most often in the comments, so I put together a simple guide. Find your situation in the table and go straight to the right file:
| Your Situation | What I Recommend |
|---|---|
| Phone is completely dead or stuck on logo | S820LUDU4AOH1, download this one. It is the latest Samsung Galaxy Core Prime SM-S820L 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 S820LUDU4AOH1 first, then follow the IMEI repair guide. Do not skip the reflash. |
| S820LUDU4AOH1 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 | S820LUDU4AOH1, 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 Core Prime SM-S820L Firmware
Download the official stock firmware for your Samsung Galaxy Core Prime SM-S820L below. The latest available version is S820LUDU4AOH1. After downloading, verify the file size matches the table above, a size mismatch usually means a partial or corrupt download, and flashing a corrupt file can cause more problems than it solves.
| Software Details | Download Link | Members Link |
|---|---|---|
|
File Name: SM-S820L_S820LUDU4AOH1_S820LTFN4AOH1_TFN_4.4.4_USA.zip Size: 792.28 MB | Download Link | Download Link2 |
Only download firmware that is fully compatible with your exact device model. See the firmware selection guide above if you are not sure.
Important: The Samsung Galaxy Core Prime SM-S820L (SM-S820L) should not be confused with other Galaxy Core Prime variants that may have different chipsets or regional firmware. Even devices in the same Galaxy Core Prime line can use completely different processors. Always verify your exact model code “SM-S820L” in Settings > About Phone before downloading any firmware from this page.
- The model code on your phone must match SM-S820L exactly. Even a single letter variant (like adding or dropping an “i” or “s”) can mean a different chipset inside.
- Your chipset should be Qualcomm MSM8916 Snapdragon 410. Recovery mode shows this information if you are not sure.
- Do not mix firmware from other download sites with the files on this page.
- If the downloaded file is much smaller than what is listed in the table above, re-download it, partial files will fail.
Prepare Your Samsung Galaxy Core Prime SM-S820L for Flashing
Go through this list before you open Odin for the Samsung Galaxy Core Prime SM-S820L. Two things that commonly cause problems with Samsung devices: a Samsung account that was not signed out before flashing, which can trigger KG lock, and a USB cable that works for charging but drops the connection mid-flash. Always use a proper data cable, not a charge-only cable.
- Back Up IMEI Numbers: Dial *#06# and write down both IMEI numbers now. You will need these if you need to restore your IMEI after flashing.
- Remove Google Accounts: Sign out of all Google accounts to prevent FRP lock after flashing.
- Remove Samsung Accounts: Sign out of all Samsung accounts to avoid KG lock.
- Back Up Your Data: Back up everything, photos, contacts, WhatsApp chats, important files. Flashing wipes the device completely.
- Charge Your Device: At least 50% battery. A device that powers off during a flash is very difficult to recover.
- USB Cable & PC: Use a proper data USB cable, not a charge-only cable, and a Windows computer with available USB ports.
- Install Required Drivers:
Samsung Galaxy Core Prime SM-S820L Firmware Installation Guide
We are using Odin for this. A quick tip: keep “Auto Reboot” and “F. Reset Time” both checked in Odin, those two options together give you the cleanest flash result. If you are not sure which Odin version to use, check our Odin versions page. Some older Samsung devices work better with older Odin builds.
- Get the Firmware Ready:
- Download the firmware file from the download section above.
- Right-click the ZIP and select “Extract Here” or use 7-Zip. Put the extracted files in a folder without spaces in the name, like
C:firmware.
- Verify Your Drivers:
- Make sure the required drivers are installed. After installing, restart your PC, drivers often do not activate until after a reboot.
- Load the Firmware File:
- In Odin, click “BL” and select the BL_*.tar.md5 file. Click “AP” and select the AP_*.tar.md5 file. Repeat for “CP” and “CSC”. Use HOME_CSC to keep data, or CSC for a clean flash.
- Connect Your Device:
- Enter Download Mode: Turn off your phone, then hold Volume Down + Power (add Home button on older models) until the warning screen appears. Press Volume Up to confirm and enter Download Mode.
- Connect your phone to your PC via USB. Odin should show “Added..” in the log area, this means your device is detected.
- Start Flashing:
- Hit the “Start” button in the flash tool to start the process.
- Leave the phone and cable completely alone until it finishes. Any interruption during this stage risks corrupting the flash.
- Wait and Reboot:
- When the flash completes, unplug the USB cable from your phone.
- Turn on the device. First boot takes 3 to 8 minutes, do not force restart it during this time.
Video Guide for Flashing
After Flashing: What Happens Next on Samsung Galaxy Core Prime SM-S820L
Here is what is completely normal after a successful flash:
- How to know the flash was successful: Odin will show “PASS.” in green text at the top-left of the log area. If you see this, everything went fine.
- The phone may ask for language and region again, this is normal after a flash. You are starting from a clean state, so the setup wizard runs just like when the phone was brand new.
- Dial *#06# immediately after setup to check your IMEI. Do this before you insert a SIM card. If it shows “unknown” or “null”, follow the IMEI repair guide below before doing anything else.
- All your apps are gone, this is expected. Reinstall them from the Play Store. If you had a Google account backup active, it will offer to restore your apps automatically during setup.
- Fingerprint and face unlock data are erased during the flash. You will need to re-register your fingerprints and face data from scratch in the security settings.
- Battery percentage may seem inaccurate for the first day. The battery statistics are calibrated during normal use. Charge the phone fully once without interruption and the readings will stabilize.
- Stuck in a bootloop after first boot? Enter recovery mode and do a factory reset from there, see the hard reset guide above. This can happen occasionally and does not mean the firmware is wrong.
Samsung Galaxy Core Prime SM-S820L Flashing Problems and Fixes
- Odin Shows “FAIL” Instead of “PASS”:
- This is usually a mismatch between the firmware region or model and your device. Confirm your exact model number in Settings › About Phone before selecting the firmware. Even a single letter difference in the model code matters.
- Samsung Galaxy Core Prime SM-S820L Not Recognized by Odin:
- Reinstall the Samsung USB drivers. Make sure you are in Download Mode. Try a different USB cable, Odin can be sensitive to cable quality.
- KG Lock / Knox Triggered After Flashing:
- This happens when a Samsung account was still signed in before flashing, or when unofficial firmware was used. Always sign out of Samsung accounts before flashing. If KG lock is already active, a professional unlocking tool is generally needed.
- Boot Loop After Flashing:
- Enter recovery mode (Volume Up + Power) and perform a factory reset. This clears any leftover data from the previous firmware that may be causing the conflict.
Missing IMEI or Corrupt Baseband on Samsung Galaxy Core Prime SM-S820L After Flashing?
A missing IMEI on a Samsung device after flashing usually points to a corrupted EFS partition, this is the partition that stores your IMEI and carrier settings. Note that restoring an IMEI that is not your original number is illegal in most countries, so only do this if you are restoring the number the device had before you flashed. Tools like ChimeraTool or BFT can help with this. Check your local laws before proceeding.
Video Guide: How to repair IMEI
Frequently Asked Questions
Q1: How do I enter recovery mode?
A: Power the device off completely, then hold Volume Up + Power at the same time until the recovery menu appears. For older Samsung models with a physical Home button, use Volume Up + Home + Power. The recovery menu displays the build number which you can use to verify your firmware version before flashing.
Q2: Is it safe to flash during a power outage risk?
A: It is best to avoid flashing during unstable power conditions. If your PC shuts down during the flash, it can corrupt the write and leave the phone in an unbootable state. If you are in an area with unreliable power, use a laptop with a fully charged battery instead of a desktop.
Q3: Will flashing erase my data?
A: Yes, flashing with Odin restores the device to factory state, including Android 4.4.4 (KitKat), upgradable to 5.1.1 (Lollipop) default settings. All apps, photos, contacts, and accounts will be removed. Back up everything you need before you start. There is no way to recover data once the flash is complete.
Q4: My device is not detected by Odin. What should I do?
A: Start with the drivers, reinstall the Samsung USB drivers, restart your PC, then try again. Switch to a USB 2.0 port if you are on USB 3.0. Disable your antivirus temporarily. If none of that works, leave a comment with the exact error message.
Q5: Can I use a Mac or Linux computer for this?
A: Samsung firmware can be flashed using Heimdall on Linux or Mac, but the instructions on this page are written for Odin on Windows. If you only have a Mac, you may want to use a Windows virtual machine or Boot Camp for the most straightforward experience.
Q6: Can I go back to an older firmware version?
A: It is technically possible on some Qualcomm builds, but downgrading can cause security issues and app compatibility problems. If the latest version is causing trouble, leave a comment below, there is usually a better fix than rolling back.
Q7: What should I do if I encounter an FRP lock after flashing?
A: Use our free Android apps launcher. FRP lock activates when a Google account was still signed in before flashing. This is why signing out of your Google account before flashing avoids this issue entirely.
Q8: Can I flash this firmware if my phone does not turn on at all?
A: Yes, in most cases. Samsung devices can usually enter Download Mode even when the screen is completely dead, hold Volume Down + Power for 10 seconds. If the battery is completely drained, charge it for at least 15 minutes first.
People Also Ask About Samsung Galaxy Core Prime SM-S820L
What chipset does the Samsung Galaxy Core Prime SM-S820L use?
The Samsung Galaxy Core Prime SM-S820L is powered by the Qualcomm MSM8916 Snapdragon 410, a Qualcomm processor. Flashing requires QFIL (Qualcomm Flash Image Loader) and Qualcomm HS-USB QDLoader drivers. The device must be in EDL (Emergency Download) mode for firmware installation.
Will flashing firmware on Samsung Galaxy Core Prime SM-S820L erase my data?
Yes. Flashing stock firmware on the Samsung Galaxy Core Prime SM-S820L with Odin performs a full factory reset. All apps, photos, contacts, and accounts will be removed. Back up everything important before you start. There is no way to recover data after flashing.
Can flashing firmware fix a bricked Samsung Galaxy Core Prime SM-S820L?
Yes. If your Samsung Galaxy Core Prime SM-S820L is stuck on the logo, in a bootloop, or will not turn on, flashing the stock firmware with Odin can restore it to working condition. This is the standard repair method used by service centers for Samsung devices.
What is the latest firmware version for Samsung Galaxy Core Prime SM-S820L?
The latest available Samsung Galaxy Core Prime SM-S820L firmware on this page is version S820LUDU4AOH1. This page has 1 firmware build available for download. Check the firmware details table above for file sizes and Android versions.
Final Thoughts
This guide covers the entire flashing process for the Samsung Galaxy Core Prime SM-S820L. With S820LUDU4AOH1 installed, your device should boot cleanly and be ready for setup.
If you ran into an issue that is not covered here, or if one of the steps did not work the way it should, let me know in the comments. Include the error code or screenshot if you have one.
Bookmark this page if you work on Samsung devices regularly. I keep it updated when new firmware versions come out.
Browse all Samsung firmware downloads for more devices.
Disclaimer: Flashing stock firmware is performed at your own risk. Follow the instructions on this page carefully. I cannot be held responsible for any damage to your device, but I will always try to help if something goes wrong.
