Last Updated: July 10, 2026
This page provides everything you need for the Samsung Galaxy Ace Duos S6802: official firmware downloads, the correct drivers and flash tool, and step-by-step instructions to unbrick, bypass FRP, or do a clean reflash.
Device: Samsung Galaxy Ace Duos S6802 | Chipset: Qualcomm MSM7627 | Flash Tool: Odin
Android: Android 2.3 (Gingerbread), TouchWiz UX UI | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Device: Samsung Galaxy Ace Duos S6802 (Qualcomm MSM7627)
Flash Tool: Odin
Latest Build: the latest version
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 Ace Duos S6802 Firmware (Flash File) Drivers, Tools & Guide
Flashing Samsung firmware with Odin is straightforward once you know the process. I have gathered the right firmware file for the Samsung Galaxy Ace Duos S6802, the correct Odin version, and the steps that work.
One thing to do before you start: if your device has a Samsung account signed in, sign it out before doing anything else. Knox will trigger if this step is skipped, and dealing with a KG lock after flashing takes extra time. Also, Samsung firmware comes in .tar.md5 format, after extracting the ZIP, you should see files named AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*). If you do not see these, you have the wrong package.
Only one firmware build is currently available for the Samsung Galaxy Ace Duos S6802. This is the stock ROM you should use for recovery, unbricking, or FRP bypass. The Samsung Galaxy Ace Duos S6802 was originally released in 2012, which means USB driver compatibility on newer Windows versions (10/11) may require manual installation rather than plug-and-play. The stock firmware ships with Android 2.3 (Gingerbread), TouchWiz UX UI, which determines the default apps, security features, and interface you will see after flashing.
The Samsung Galaxy Ace Duos S6802 was released in 2012. This page is maintained with the latest available firmware builds as they become available. Samsung firmware uses a multi-file system (AP, BL, CP, CSC) specific to Odin-based flashing, which differs from single-file scatter-based tools.
Your Samsung Galaxy Ace Duos S6802 firmware comes as a compressed ZIP file. Download and extract it using WinRAR or 7-Zip. After extracting, 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.
This process restores the phone to its original factory state, which means all your personal data will be lost. That clean wipe is exactly what fixes persistent problems like bootloops, forgotten locks, Google account verification, battery drain, and system errors.
Factory Reset Samsung Galaxy Ace Duos S6802 Without a PC
To factory reset Samsung Galaxy Ace Duos S6802 without a computer, power off the device completely, then hold Volume Up + Power (for older models with a Home button, use Volume Up + Home + Power) at the same time 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 Samsung Galaxy Ace Duos S6802 to its original factory state. This fixes most software problems, slow performance, app crashes, forgotten screen locks, and bootloops. If the issue persists after a factory reset, a full firmware flash using Odin is covered in the following sections.
Remove FRP Lock on Samsung Galaxy Ace Duos S6802
The fastest way to bypass FRP on Samsung Galaxy Ace Duos S6802 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 (FRP). Our free Android apps launcher is the fastest way to get past it. This is also why I always recommend removing your Google account before flashing, it avoids this problem entirely.
What Samsung Galaxy Ace Duos S6802 Firmware Fixes
Samsung devices like the Samsung Galaxy Ace Duos S6802 are flashed using Odin, regardless of the chipset inside. Whether you are dealing with a boot issue or a software problem, flashing the official firmware can resolve it:
- Update to the latest Android version supported by your phone.
- Restore system apps that were accidentally removed or corrupted.
- Remove persistent malware or adware that survives a factory reset.
- Unlock your device if it has been locked or disabled.
- Restore the original Samsung stock ROM to keep your warranty valid.
- Fix Wi-Fi, Bluetooth, or mobile data connectivity that stopped working after an update.
- 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.
Choosing the Right Firmware Version
The single biggest mistake I see people make 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. S6802). 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 Ace Duos S6802
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy Ace Duos S6802 |
| Firmware Version | N/A |
| File Size | 201.41 MB |
| Android Version | Android 2.3 (Gingerbread), TouchWiz UX UI |
| Platform | Qualcomm MSM7627 |
| Release Date | Released 2012, June |
| 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 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 | the latest version, download this one. It is the latest Samsung Galaxy Ace Duos S6802 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 the latest version first, then follow the IMEI repair guide. Do not skip the reflash. |
| the latest version 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 | the latest version, 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 Ace Duos S6802 Firmware
Download the official stock firmware for your Samsung Galaxy Ace Duos S6802 below. The latest available version is the latest version. 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: S6802DDMA1_S6802ODDLI4_INU.zip Size: 201.41 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 Ace Duos S6802 (S6802) should not be confused with other Galaxy Ace Duos S6802 variants that may have different chipsets or regional firmware. Even devices in the same Galaxy Ace Duos S6802 line can use completely different processors. Always verify your exact model code “S6802” in Settings > About Phone before downloading any firmware from this page.
- Go to Settings and verify your model is exactly S6802. Phones with similar names can have completely different hardware.
- The chipset in your device should be Qualcomm MSM7627. If it is different, this firmware will not work.
- Always download directly from the table on this page to ensure you have the correct build.
- Check the file size after downloading, a mismatch with the listed size means a partial or corrupt download.
Prerequisites for Samsung Galaxy Ace Duos S6802 Firmware
Go through this list before you open Odin for the Samsung Galaxy Ace Duos S6802. 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.
- Save Your IMEI Numbers: Type *#06# in the phone dialer and note down both numbers. These are your device identifiers for the cellular network. If flashing wipes them, you will need the originals to write them back.
- Disconnect Google Accounts: Before you start anything, remove all Google accounts from the phone. Settings then Accounts then tap each Google account and remove it. This avoids the FRP verification screen that appears after flashing if accounts were still linked.
- Remove Samsung Accounts: Sign out of all Samsung accounts to avoid KG lock.
- Create a Backup: Copy your data to your computer or an SD card. Flashing replaces the entire software on the phone, which means all personal data, apps, and settings will be permanently deleted.
- Charge First: Get the battery above 50% before starting. The flashing process takes a few minutes and the first boot takes several more. A power failure during either stage can leave the device in a state that requires more advanced recovery.
- Prepare Your PC Connection: You need a Windows computer and a USB cable that supports data transfer. Test the cable first by connecting the phone normally, if it shows up in File Explorer, the cable is good.
- Install the Right Drivers:
Install Stock Firmware on Samsung Galaxy Ace Duos S6802
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 Unpack:
- Pick the correct firmware version from the downloads above and save it to your PC.
- Extract the ZIP file. If the extracted folder contains another ZIP inside, extract that one too. You should end up with the actual firmware files, not another archive.
- Driver Check:
- Double-check that you have installed the required drivers. A missing driver is the most common reason the flash tool cannot detect your phone. Reboot your PC after installing.
- 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:
- Start the flash by clicking “Start”.
- Leave everything untouched until completion. Even bumping the USB cable can interrupt the write and cause a failed flash.
- Wait and Reboot:
- The flash is complete when the tool shows a success indicator. Disconnect your phone.
- Turn the phone on. Do not worry if it sits on the boot logo for several minutes, the system is rebuilding itself from scratch.
Video Guide for Flashing
What to Expect After Flashing
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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
Fix Common Samsung Galaxy Ace Duos S6802 Firmware 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 Ace Duos S6802 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 Ace Duos S6802 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
Common Questions About Flashing Samsung Galaxy Ace Duos S6802
Q1: Is this firmware compatible with other Samsung models?
A: No. This firmware is built specifically for the Samsung Galaxy Ace Duos S6802 running on the Qualcomm MSM7627 chipset. Even variants of the Galaxy Ace Duos S6802 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.
Q2: 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.
Q3: 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.
Q4: Will flashing erase my data?
A: Yes, flashing with Odin restores the device to factory state, including Android 2.3 (Gingerbread), TouchWiz UX UI 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.
Q5: 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.
Q6: What if the flash fails halfway through?
A: Do not panic and do not disconnect the phone. Close Odin, restart it, and try the flash again from the beginning. In most cases, a failed flash just means the process needs to be repeated. The device is usually still detectable by the flash tool even after a failed attempt.
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 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.
People Also Ask About Samsung Galaxy Ace Duos S6802
What is the latest firmware version for Samsung Galaxy Ace Duos S6802?
The latest available Samsung Galaxy Ace Duos S6802 firmware on this page is version the latest version. This page has 1 firmware build available for download. Check the firmware details table above for file sizes and Android versions.
Can flashing firmware fix a bricked Samsung Galaxy Ace Duos S6802?
Yes. If your Samsung Galaxy Ace Duos S6802 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.
How do I check my Samsung Galaxy Ace Duos S6802 model number before flashing?
Go to Settings > About Phone on your Samsung Galaxy Ace Duos S6802 and look for the model number “S6802”. You can also confirm by entering recovery mode (Volume Up + Power while powered off) which displays the build number and model code. Always match this exactly with the firmware filename before flashing.
Will flashing firmware on Samsung Galaxy Ace Duos S6802 erase my data?
Yes. Flashing stock firmware on the Samsung Galaxy Ace Duos S6802 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 Ace Duos S6802 Firmware
The flash is done. Your Samsung Galaxy Ace Duos S6802 is back on official stock firmware and should be running without the issues that brought you here.
If anything went differently than described, an error message, a step that did not match your setup, post it in the comments. I respond to every question.
This guide gets updated when new builds are released, so you can come back anytime you need a newer version.
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.
