Last Updated: June 3, 2026
Get your SM-M315F/DS back to normal with the official Samsung Galaxy M31 Prime SM-M315F/DS firmware. This page contains every file you need, including flash tools, USB drivers, and step-by-step instructions for FRP bypass, hard resets, and IMEI repair.
Device: Samsung Galaxy M31 Prime SM-M315F/DS | Chipset: Samsung Exynos 9611 (Octa-core 4x 2.3 GHz ARM Cortex-A73 & 4x 1.7 GHz ARM Cortex-A53, Mali-G72 MP3 GPU) | Flash Tool: Odin
Android: Android 10, One UI 2.0 | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Samsung Galaxy M31 Prime SM-M315F/DS Firmware (Flash File) Drivers, Tools & Guide
Flashing a Samsung phone with Odin is a simple process when you have the correct files. This section covers the exact Samsung Galaxy M31 Prime SM-M315F/DS firmware, the right Odin version, and the exact steps that work reliably.
Before you begin, check if a Samsung account is signed in on the device. Sign it out completely. Skipping this step triggers Knox security, and dealing with a KG lock takes extra time. Also, Samsung firmware packages use a .tar.md5 format. Once you extract the ZIP folder, look for files labeled AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*). If these files are missing, you have downloaded the wrong package.
Your Samsung Galaxy M31 Prime SM-M315F/DS firmware arrives as a compressed ZIP file. Extract it using WinRAR or 7-Zip. 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.
Keep in mind that flashing stock firmware erases all data. This is intentional and resolves software issues including FRP lock, app crashes, sluggish performance, forgotten pattern locks, a device stuck on the logo, Wi-Fi and Bluetooth drops, battery drain, and soft brick situations.
Hard Reset Samsung Galaxy M31 Prime SM-M315F/DS
You can factory reset the Samsung Galaxy M31 Prime SM-M315F/DS without a computer by powering off the device completely, then holding Volume Up + Power (or Volume Up + Home + Power for older models with a physical Home button) until the recovery menu appears. Use the volume keys to highlight “Wipe Data/Factory Reset” and press the Power button to confirm.
A hard reset erases all personal data and returns the Samsung Galaxy M31 Prime SM-M315F/DS to its factory state. This process fixes most software glitches, including slow performance, app crashes, forgotten screen locks, and bootloops. If the problem remains after a factory reset, the following sections cover a full firmware flash using Odin.
Samsung Galaxy M31 Prime SM-M315F/DS FRP Bypass
The fastest way to bypass FRP on the Samsung Galaxy M31 Prime SM-M315F/DS is to use a free Android apps launcher that grants access to settings during the setup wizard. You might see a Google account lock (FRP) after a factory reset or flash. Our free Android apps launcher provides the quickest solution. This is exactly why I always advise removing your Google account before flashing, it prevents this hurdle entirely.
Why Do We Need Samsung Galaxy M31 Prime SM-M315F/DS Firmware?
Flashing the official Samsung Galaxy M31 Prime SM-M315F/DS firmware is necessary to fix software issues because Odin completely reinstalls the operating system, regardless of the internal chipset. Whether you face a boot error or performance problems, the official firmware can resolve it:
- Remove locks if the device is disabled or restricted.
- Upgrade the phone to the newest Android version officially supported.
- Stop startup loops, system lag, and random freezing on your SM-M315F/DS Galaxy M31 Prime.
- Fix failed OTA updates and rapid battery drain.
- Revert to the original Samsung stock ROM to maintain your warranty status.
- Fix the phone if it only boots into the recovery menu.
- Clear KG lock or Knox errors caused by an interrupted or incorrect flash.
Learn more about stock ROMs and why flashing works.
Choosing the Right Firmware Version
You must verify you have the correct firmware file before starting the flashing process. Installing the wrong firmware causes errors that are difficult to fix:
- Identify Your Exact Model Number: Navigate to Settings › About Phone and write down your full model number (e.g. SM-M315F/DS). The letter suffix is important, U/U1 = USA, W = Canada, N = Korea, B/F = International/Global. Flashing a file meant for a different variant causes problems.
- Match the CSC (Region): The 3-letter region code in the firmware name must match your phone. Check Settings › About Phone › Software Information for your current CSC, or view the Service Provider line in Download Mode. Common codes include XAA (US), BTU (UK), INS (India), and SER (Russia).
- Check the Binary Level: Review 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 phone operates on Binary 9, only install Binary 9 or higher. - Confirm the Build Date: The last 4 characters of the PDA version indicate the build date, the first character is the year (A=2024, B=2025, C=2026), and the second is the month (A=Jan through L=Dec).
- Verify in Download Mode: Turn the phone off, then hold Volume Down + Power to enter Download Mode. This screen displays your exact model, CSC, and current firmware version, use this to double-check before flashing.
Firmware Details for Samsung Galaxy M31 Prime SM-M315F/DS
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy M31 Prime SM-M315F/DS |
| Firmware Version | N/A |
| File Size | N/A |
| Android Version | Android 10, One UI 2.0 |
| Platform | Samsung Exynos 9611 (Octa-core 4x 2.3 GHz ARM Cortex-A73 & 4x 1.7 GHz ARM Cortex-A53, Mali-G72 MP3 GPU) |
| Release Date | Released 2020, October 17 |
| Region | Global, Africa and Asia |
| File Type | .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin) |
Which Firmware Version Should I Download?
You should download the firmware version that matches your specific issue, binary level, and region code. 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 M31 Prime SM-M315F/DS 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 M31 Prime SM-M315F/DS Firmware
You can download the official stock firmware for the Samsung Galaxy M31 Prime SM-M315F/DS directly from the links provided below. The latest available version is the latest version. After downloading, verify the file size matches the table above. A size mismatch usually points to a partial or corrupt download, and flashing a broken file creates more problems than it solves.
Only download firmware that is fully compatible with your exact device model. See the firmware selection guide above if you are not sure.
- Your model number is a variant of SM-M315F/DS with a different letter suffix. Check About Phone carefully, one letter difference can cause a failed or broken flash.
- Your chipset differs from Samsung Exynos 9611 (Octa-core 4x 2.3 GHz ARM Cortex-A73 & 4x 1.7 GHz ARM Cortex-A53, Mali-G72 MP3 GPU). 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 M31 Prime SM-M315F/DS Firmware
Review this checklist before opening Odin for the Samsung Galaxy M31 Prime SM-M315F/DS. Two things commonly disrupt Samsung flashes: a Samsung account left signed in (which triggers KG lock) and a low-quality USB cable that drops the connection mid-flash. Always use a proper data cable, not a charge-only cord.
- Back Up IMEI Numbers: Dial *#06# and write down both IMEI numbers right now. You will need these if you must restore your IMEI after the flash.
- 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: Save your photos, contacts, WhatsApp chats, and important files. Flashing completely wipes the device.
- Charge Your Device: Ensure the battery is at least 50%. A phone that powers off during a flash is very difficult to recover.
- USB Cable & PC: Use a reliable data USB cable and a Windows computer with available USB ports.
- Install Required Drivers:
How to Install Firmware on Samsung Galaxy M31 Prime SM-M315F/DS
You will use Odin for this process. A quick tip: keep “Auto Reboot” and “F. Reset Time” checked in Odin to get the cleanest flash result. If you are not sure which Odin version to use, check our Odin versions page. Some older Samsung phones work better with older Odin builds.
- Download and Extract:
- Download the correct firmware package from the links provided above.
- Extract the ZIP file to a simple folder path. Avoid paths with spaces or special characters, as some flash tools struggle to read them.
- Install the Listed Drivers:
- Confirm all drivers listed above are installed and restart your PC. Skipping the restart often causes drivers to fail.
- Load the Firmware File:
- Inside Odin, click “BL” and select the BL_*.tar.md5 file. Click “AP” and choose the AP_*.tar.md5 file. Repeat this for “CP” and “CSC”. Select HOME_CSC to keep your data, or CSC for a completely clean flash.
- Connect Your Device:
- Enter Download Mode: Turn off the phone, then hold Volume Down + Power (add the Home button on older models) until the warning screen appears. Press Volume Up to confirm and enter Download Mode.
- Connect the phone to your PC via USB. Odin should display “Added..” in the log area, which means the device is detected.
- Start Flashing:
- Click the “Start” button to begin.
- Do not disconnect, move the cable, or touch the phone until the process finishes. Disconnecting mid-flash causes software corruption.
- Wait and Reboot:
- Once the flashing finishes successfully, disconnect the phone.
- Power on the device. The first boot takes longer than usual, allow up to 8 minutes.
Video Guide for Flashing
What to Expect After Flashing Samsung Galaxy M31 Prime SM-M315F/DS Firmware
Many users assume something went wrong immediately after a flash when the phone is simply setting itself up. Here is what is completely normal after installing the Samsung Galaxy M31 Prime SM-M315F/DS firmware:
- How to know the flash was successful: Odin will display “PASS.” in green text at the top-left of the log area. Seeing this means everything went smoothly.
- First boot takes 3 to 8 minutes, do not force-reboot the phone. The operating system is configuring itself from scratch. Interrupting this setup causes bootloops.
- The phone will feel warm during first boot, this is normal behavior. It cools down after a few minutes once the initial setup finishes.
- 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.
- Dial *#06# immediately after setup to check your IMEI. Do this before inserting a SIM card. If it shows “unknown” or “null”, follow the IMEI repair guide below before doing anything else.
- Be careful when re-adding your Google account, if you did not remove it before flashing, you may see an FRP prompt. Add it fresh during the setup wizard, not afterwards through Settings.
- Wi-Fi, Bluetooth, and mobile data should 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.
- Stuck in a bootloop after first boot? Enter recovery mode and perform a factory reset from there, see the hard reset guide above. This happens occasionally and does not mean the firmware is wrong, it usually points to a conflict with leftover data from the old install.
- Samsung Smart Switch: After flashing your Samsung Galaxy M31 Prime SM-M315F/DS firmware, Samsung Smart Switch may prompt you to install additional updates. Let it complete, this ensures your device has the latest security patches for your region.
Missing IMEI or Corrupt Baseband on Samsung Galaxy M31 Prime SM-M315F/DS After Flashing?
A missing IMEI on a Samsung device after flashing usually indicates a corrupted EFS partition, which is where your IMEI and carrier settings are stored. Restoring an IMEI that does not belong to your original device is illegal in most countries, so only do this if you are restoring the number the phone had before you flashed. Tools like ChimeraTool or BFT can help with this process. Check your local laws before proceeding.
Video Guide: How to repair IMEI
Common Issues When Flashing Samsung Galaxy M31 Prime SM-M315F/DS
- Odin Shows “FAIL” Instead of “PASS”:
- This usually means there is 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 M31 Prime SM-M315F/DS Not Recognized by Odin:
- Reinstall the Samsung USB drivers. Ensure 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.
Frequently Asked Questions
Q1: Will flashing the Samsung Galaxy M31 Prime SM-M315F/DS firmware erase my data?
A: Yes, installing this firmware with Odin returns your phone to its factory state, including Android 10, One UI 2.0 default settings. All apps, photos, contacts, and accounts will be deleted. Back up everything you need before you begin. There is no way to recover data once the flash finishes.
Q2: Is this firmware compatible with other Samsung models?
A: No. This firmware is built exclusively for the Samsung Galaxy M31 Prime SM-M315F/DS running on the Samsung Exynos 9611 (Octa-core 4x 2.3 GHz ARM Cortex-A73 & 4x 1.7 GHz ARM Cortex-A53, Mali-G72 MP3 GPU) chipset. Even the Galaxy M31 Prime with a different letter suffix (for example, a different variant of SM-M315F/DS) can have a completely different internal chipset. Flashing the wrong firmware leaves your phone in a state that is very difficult to fix. Always check your exact model number in Settings › About Phone.
Q3: Can I downgrade from the latest version to an older firmware version?
A: It is technically possible on some Exynos builds, but I do not recommend it. Downgrading causes security issues and app compatibility problems on Android 10, One UI 2.0. If the latest version gives you trouble, leave a comment below, there is usually a better fix than rolling back.
Q4: What should I do if I encounter an FRP lock after flashing?
A: Use our free Android apps launcher. FRP lock on the Samsung Galaxy M31 Prime SM-M315F/DS activates when a Google account remains signed in before flashing. This is why I always recommend signing out of your Google account before flashing, it prevents this issue entirely.
Q5: Are custom ROM options available for the Samsung Galaxy M31 Prime SM-M315F/DS?
A: This guide covers official Samsung stock firmware only. Custom ROM availability for the Samsung Galaxy M31 Prime SM-M315F/DS depends on whether the Samsung Exynos 9611 (Octa-core 4x 2.3 GHz ARM Cortex-A73 & 4x 1.7 GHz ARM Cortex-A53, Mali-G72 MP3 GPU) chipset has open-source kernel support. Check our Custom ROMs page or the XDA Developers forum for device-specific custom ROM threads.
Q6: My Samsung Galaxy M31 Prime SM-M315F/DS is not detected by Odin. What should I do?
A: Do not worry, I have been there. 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, Samsung phones are more reliable on USB 2.0 ports. Disable your antivirus temporarily. If none of that works, leave a comment below with the exact error message and I will help you from there.
Q7: How do I enter recovery mode on my Samsung Galaxy M31 Prime SM-M315F/DS?
A: Turn 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 for your Samsung Galaxy M31 Prime SM-M315F/DS, which you can use to verify your firmware version before flashing.
Q8: My IMEI shows “unknown” after flashing the Samsung Galaxy M31 Prime SM-M315F/DS. 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. The important thing: do not insert a SIM card until the IMEI is restored.
Q9: How long does it take to flash Samsung Galaxy M31 Prime SM-M315F/DS firmware?
A: The actual flashing process usually takes between 3 and 10 minutes depending on the firmware size and your USB connection speed. The first boot after flashing takes longer, anywhere from 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.
Final Thoughts on Samsung Galaxy M31 Prime SM-M315F/DS Firmware
Following these steps will help you safely flash the official Samsung Galaxy M31 Prime SM-M315F/DS firmware (the latest version) using Odin and restore normal operation. If you followed each step, your phone should now run on a clean build.
If something did not go as expected, a specific error, or a step that is not working for your setup, leave a comment below with as much detail as you can. Provide 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 facing 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.
