Last Updated: July 5, 2026
This page contains the complete resources to flash the Samsung Galaxy A3 A300H firmware, including the stock ROM, drivers, and step-by-step instructions.
Device: Samsung Galaxy A3 A300H | Chipset: Qualcomm Snapdragon 410 MSM8916 | Flash Tool: Odin
Android: Android 4.4.4 KitKat, upgradable to 6.0.1 Marshmallow | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Device: Samsung Galaxy A3 A300H (Qualcomm Snapdragon 410 MSM8916)
Flash Tool: Odin
Latest Build: XXU1BOK6
Firmware Files: 4 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 A3 A300H Firmware (Flash File) Drivers, Tools & Guide
Flashing Samsung firmware with Odin is a straightforward process once you understand the file structure. I have compiled the correct firmware files for the Samsung Galaxy A3 A300H, the right Odin version, and the necessary steps on this page.
One critical step before you begin is signing out of your Samsung account. If you skip this, Knox will trigger after the flash, and removing the lock requires extra time and tools. Samsung firmware typically comes in a .tar.md5 format. After extracting the ZIP file, you should look for files named AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*). If you do not see these specific files, you likely have the wrong package for your device.
There are four firmware versions available for the Samsung Galaxy A3 A300H on this page. Choose the version that matches your current Android build for the smoothest experience. The stock firmware runs Android 4.4.4 KitKat but can be upgraded to 6.0.1 Marshmallow. This determines the interface and security features you will see after the flash. The Samsung Galaxy A3 A300H is powered by a Qualcomm Snapdragon 410 MSM8916 processor, which requires Qualcomm Flash Image Loader (QFIL) and Qualcomm HS-USB drivers. Ensure you install the correct driver package before connecting your phone.
This page archives four different firmware versions for the Samsung Galaxy A3 A300H, covering various Android builds and security patches. Samsung uses a multi-file system (AP, BL, CP, CSC) for Odin flashing, which is different from the single-file scatter-based tools used on some other chipsets.
Your Samsung Galaxy A3 A300H firmware is packaged as a compressed ZIP file. Download and extract it using WinRAR or 7-Zip. Once extracted, you should see files named AP_*.tar.md5, BL_*.tar.md5, CP_*.tar.md5, and CSC_*.tar.md5 (or HOME_CSC_*.tar.md5). If these files are missing, the firmware package is likely incorrect for your device.
Flashing completely replaces your current software and wipes all personal data. This is the intended behavior, it clears out FRP locks, bootloops, pattern locks, app crashes, and other software issues that a standard reset cannot resolve.
Reset Samsung Galaxy A3 A300H From Recovery Mode
To factory reset the Samsung Galaxy A3 A300H without a computer, power the device off completely. Then, hold Volume Up + Power (for older models with a Home button, use Volume Up + Home + Power) simultaneously until the recovery menu appears. 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 A3 A300H to its original factory state. This resolves most software problems such as slow performance, app crashes, forgotten locks, and bootloops. If the issue persists after a factory reset, a full firmware flash using Odin is covered in the following sections.
Samsung Galaxy A3 A300H FRP Bypass
The fastest method to bypass FRP on the Samsung Galaxy A3 A300H is to use a free Android apps launcher that allows access to settings during the setup wizard. After flashing or performing a factory reset, you may encounter a Google account lock (FRP). Using our free Android apps launcher is the quickest way to bypass this screen. This is why I always recommend removing your Google account before flashing, it prevents this issue entirely.
Common Reasons to Reinstall Samsung Galaxy A3 A300H Firmware
Samsung devices like the Samsung Galaxy A3 A300H are flashed using Odin, regardless of the chipset inside. Whether you are dealing with a boot issue or a software glitch, flashing the official firmware can resolve it:
- Remove persistent malware or adware that survives a factory reset.
- Restore system apps that were accidentally removed or corrupted.
- Unlock your device if it has been locked or disabled.
- Resolve touchscreen responsiveness issues caused by a corrupted system build.
- Restore the original Samsung stock ROM to keep your warranty valid.
- Repair a phone that shuts down randomly or restarts in a loop.
- 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.
Verify Your Samsung Galaxy A3 A300H Model Before Downloading
The most common mistake is flashing firmware meant for a different variant. 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. A300H). 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 A3 A300H
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy A3 A300H |
| Firmware Version | XXU1AOC5, XXU1BOK6 |
| File Size | 583.82 MB to 816.39 MB |
| Android Version | Android 4.4.4 KitKat, upgradable to 6.0.1 Marshmallow |
| Platform | Qualcomm Snapdragon 410 MSM8916 |
| Release Date | Released 2014, December |
| Region | Global, Africa and Asia |
| File Type | .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin) |
Which Firmware Version Should I Download?
This is the most common question I receive, so I have 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 | XXU1BOK6, download this one. It is the latest Samsung Galaxy A3 A300H 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 XXU1AOC5, 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 XXU1BOK6 first, then follow the IMEI repair guide. Do not skip the reflash. |
| XXU1BOK6 failed with a flash error | Try XXU1AOC5 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 | XXU1BOK6, 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 A3 A300H Firmware
Download the official stock firmware for your Samsung Galaxy A3 A300H below. The latest available version is XXU1BOK6. 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: A300HXXU1AOC5_A300HODD1AOC1_INS.zip Size: 583.82 MB | Download Link | Download Link2 |
| File Name: A300HXXU1AOC5_A300HODD1AOC1_INU.zip Size: 583.82 MB | Download Link | Download Link2 |
| File Name: A300HXXU1BOK6_A300HODD1BOJ1_INS.zip Size: 816.39 MB | Download Link | Download Link2 |
| File Name: A300HXXU1BOK6_A300HODD1BOJ1_INU.zip Size: 816.39 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 A3 A300H (A300H) should not be confused with other Galaxy A3 variants that may have different chipsets or regional firmware. Even devices in the same Galaxy A3 line can use completely different processors. Always verify your exact model code “A300H” in Settings > About Phone before downloading any firmware from this page.
- Open About Phone and make sure the model code reads A300H. Do not rely on the name printed on the phone case.
- Verify the chipset is Qualcomm Snapdragon 410 MSM8916. You can see this in recovery mode or by checking the device specifications online.
- Use only the download links provided on this page.
- After downloading, right-click the file and check Properties to confirm the size matches the table above. If it does not, download it again.
What You Need Before Flashing Samsung Galaxy A3 A300H
Go through this list before you open Odin for the Samsung Galaxy A3 A300H. 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.
- IMEI Backup: Open the dialer and enter *#06#. Write both IMEI numbers down on paper or take a screenshot. If you ever need to repair your IMEI after flashing, these are essential.
- Remove All Google Accounts: Go to Settings, Accounts, and sign out of every Google account on the device. Leaving accounts signed in triggers FRP lock after a flash, which blocks you from setting up the phone.
- Remove Samsung Accounts: Sign out of all Samsung accounts to avoid KG lock.
- Backup Everything: Photos, contacts, messages, WhatsApp data, move it all to a computer or cloud service. The flash will restore the phone to factory state with nothing on it.
- 50% Battery Minimum: Do not start with a low battery. If power cuts out during the flash, the device can become unresponsive and much harder to fix.
- USB Cable and Computer: Use a proper data-transfer USB cable and a Windows PC. Avoid USB hubs, connect directly to the motherboard port for a stable connection.
- Download and Install Drivers:
How to Install Firmware on Samsung Galaxy A3 A300H
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.
- Download and Extract:
- Download the correct firmware package from the links above.
- Extract the ZIP to a simple folder path, avoid paths with spaces or special characters, as some flash tools have trouble with them.
- Install the Listed Drivers:
- Confirm all drivers listed above are installed and that your PC has been restarted since installation. Skipping the restart is a common reason drivers do not work correctly.
- 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:
- Click the “Start” button to begin.
- Do not disconnect, move the cable, or touch the device until the process is fully complete. Disconnecting mid-flash is how devices get bricked.
- Wait and Reboot:
- Once flashing finishes successfully, disconnect the device.
- Power on your device. The first boot will take longer than usual, give it up to 8 minutes.
Video Guide for Flashing
Normal Behavior After Installing Samsung Galaxy A3 A300H Firmware
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.
- First boot takes 3 to 8 minutes, do not force-reboot the device. The operating system is setting itself up from scratch. Interrupting this is how devices end up in bootloops.
- 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.
- Wi-Fi, Bluetooth, and mobile data should all work right after setup. If mobile data is not connecting, go to Settings, SIM and Network, and re-enter your APN manually, the flash sometimes clears carrier APN settings.
- 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.
- Storage will show almost full capacity available since all your apps and files are gone. The system partition size varies by firmware version but is typically 4 to 8 GB on most devices.
- 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.
Troubleshooting Samsung Galaxy A3 A300H Flash Errors
- 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 A3 A300H 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 A3 A300H 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: My IMEI shows “unknown” after flashing. Is my phone permanently damaged?
A: No, it looks alarming, but it is fixable. Follow the IMEI repair guide in the troubleshooting section above. For Samsung devices, check for EFS partition corruption first. Do not insert a SIM card until the IMEI is restored.
Q2: 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.
Q3: How long does the flashing process take?
A: The actual flash usually takes between 3 and 10 minutes depending on the firmware size and USB connection speed. The first boot after flashing takes another 3 to 8 minutes. Do not interrupt the device during either stage. If the progress bar in Odin appears stuck, give it a few more minutes before assuming something went wrong.
Q4: 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.
Q5: 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.
Q6: 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.
Q7: 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.
Q8: Is this firmware compatible with other Samsung models?
A: No. This firmware is built specifically for the Samsung Galaxy A3 A300H running on the Qualcomm Snapdragon 410 MSM8916 chipset. Even variants of the Galaxy A3 with a different letter suffix can have a completely different chipset inside. Flashing the wrong firmware can leave your phone in a state that is very difficult to recover from. Always check your exact model number in Settings.
People Also Ask About Samsung Galaxy A3 A300H
Can flashing firmware fix a bricked Samsung Galaxy A3 A300H?
Yes. If your Samsung Galaxy A3 A300H 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 chipset does the Samsung Galaxy A3 A300H use?
The Samsung Galaxy A3 A300H is powered by the Qualcomm Snapdragon 410 MSM8916, 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.
What is the latest firmware version for Samsung Galaxy A3 A300H?
The latest available Samsung Galaxy A3 A300H firmware on this page is version XXU1BOK6. This page has 4 firmware builds available for download. Check the firmware details table above for file sizes and Android versions.
Will flashing firmware on Samsung Galaxy A3 A300H erase my data?
Yes. Flashing stock firmware on the Samsung Galaxy A3 A300H 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.
Wrapping Up: Samsung Galaxy A3 A300H Firmware
That is everything you need to safely flash the official Samsung Galaxy A3 A300H firmware (XXU1BOK6) using Odin and get your device working again. If you followed each step, your phone should now be running on a clean build.
If something did not go as expected, a specific error, a step that is not working for your setup, leave a comment below with as much detail as you can: the exact error message, which step you are on, and what you have already tried. I read every comment and will help you work through it.
If this guide helped you, consider sharing it, it is the best way to help someone else who is dealing with the same problem.
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.
