Skip to content Skip to content
Last Updated: April 4, 2026
You can fix your Oppo A55s CPH2309 with the official Oppo A55s CPH2309 firmware. This guide provides the latest USB Driver, Flash Tool, and Oppo A55s CPH2309 flash file to help you resolve any software troubles.
Oppo A55s CPH2309 Firmware (Flash File) – Drivers, Tools & Guide
We’ve got the original firmware for your Oppo A55s CPH2309 smartphone, along with the essential SP Flash Tool and MediaTek USB drivers needed for flashing. All the files come compressed in a zip archive. You can easily extract them on your computer using software like WinRAR or 7-Zip. Just make sure the extracted firmware package includes a scatter file; it’s crucial for the flashing process.
Before you jump into flashing your smartphone, double-check that the downloaded zip files are intact and match your specific Oppo A55s CPH2309. You’ll need a Windows computer and a reliable USB cable to connect your phone. It’s also a good idea to run a malware scan on your computer before you start. For straightforward flashing instructions, follow our included How to Flash guide.
Updating the stock firmware on your Oppo device can fix a variety of software glitches. This includes issues like FRP lock, app crashes, slow performance, forgotten pattern locks, phones stuck on the Oppo logo, connectivity problems with Wi-Fi and Bluetooth, battery drain, or if your phone has become soft-bricked.
FRP Bypass Tools for Your Oppo A55s CPH2309
Sometimes, after flashing or a factory reset, you might run into a Google account lock, also known as FRP. If that happens, our free Android apps launcher can help you regain access to your phone.
Why Do We Need Oppo A55s CPH2309 Firmware?
Having the correct Oppo A55s CPH2309 firmware is really important. It helps make your phone run smoother and fixes common problems. Specifically, it can:
- Unlock your device if it’s locked.
- Update your phone to the latest Android system version.
- Resolve issues like startup loops, lagging, and freezing.
- Fix problems related to OTA updates and battery drain.
- Restore the original software (stock ROM), which can help keep your warranty valid.
- Help if your phone only seems to boot into recovery mode.
A simple firmware update can make a big difference in how well and reliably your device performs. If you want to learn more about stock ROMs, you can read more here.
Choosing the Right Firmware Version
Before you start flashing, make sure you pick the correct firmware by following these steps:
- Identify Your Device Model: Go to “About Phone” and confirm that your model is indeed Oppo A55s CPH2309.
- Verify the Build Number: Look for identifiers like “CPH2309” within your device’s build details.
- Confirm the Chipset: Based on official Oppo specs, the A55s CPH2309 uses a Mediatek Dimensity 700 (7 nm) processor. It’s an Octa-core setup with 2×2.2 GHz Cortex-A76 cores and 6×2.0 GHz Cortex-A55 cores, paired with a Mali-G57 MC2 GPU.
- Match the Firmware Version: It’s vital to ensure the firmware version and regional details match your device precisely. This prevents compatibility headaches.
- If you’re not entirely sure about your chipset or firmware version, you can try restarting your device in recovery mode. This often shows more detailed device information.
This extra check helps you select the right firmware version, minimizing any risks.
Firmware Details for Oppo A55s CPH2309
Here’s a quick rundown of the official firmware details:
| Firmware Information | Details |
|---|---|
| Device Model | Oppo A55s CPH2309 |
| Firmware Version | A.10 |
| File Size | 5.1 GB |
| Android Version | Android 11, ColorOS 11.1 |
| Platform | Mediatek Dimensity 700 (7 nm) CPU Octa-core (2×2.2 GHz Cortex-A76 & 6×2.0 GHz Cortex-A55) GPU Mali-G57 MC2 |
| Release Date | Released 2022, April 18 |
| Region | Global, Africa and Asia |
| File Type | OZIP (Encrypted ZIP Contains boot.img, system.img, vendor.img, recovery.img, super.img, vbmeta.img, dtbo.img, opporeserve.img) |
Download Oppo A55s CPH2309 Firmware
You can download the official stock firmware for your Oppo A55s CPH2309 using the links below:
| Software Details | Download Link | Members Link |
|---|---|---|
| File Name: Oppo_A55S_CPH2309_EX_11_A.10_211203_RFT.zip Size: 5.1 GB | Download Link | Download Link2 |
| File Name: Oppo_A55S_CPH2309_EX_11_A.10_211203%2528.zip Size: 5.13 GB | Download Link | Download Link2 |
| File Name: Oppo_A55S_CPH2309_EX_11_C.16_220705%2528.zip Size: 6.5 GB | Download Link | Download Link2 |
Please make sure the firmware version you choose is completely compatible with your device model and region.
Prerequisites
Before you begin the flashing process, ensure you have these items ready:
- Backup IMEI Numbers: It’s wise to jot down and save your Oppo A55s CPH2309’s IMEI numbers before you flash anything.
- Remove Google Accounts: Sign out of all Google accounts on your phone. This helps prevent FRP lock issues after flashing.
- Backup Data: Don’t forget to back up all your important files, including accounts, music, videos, and photos. Flashing will wipe your device clean.
- A Fully Charged Device: Make sure your phone’s battery is at least 50% charged.
- USB Cable & PC: You’ll need a reliable USB cable and a computer with available USB ports.
- Necessary Drivers: Download and install the following drivers:
- Data Backup: Always back up your important data to avoid any loss during the flashing procedure.
How to Install Firmware on Oppo A55s CPH2309
You can flash using the SP Flash Tool and the secure boot Download Agent (for SLA/DAA devices). If you can’t find the Secure Boot Download Agent (DA) file for your model, consider using MTK Client for flashing. Here are the step-by-step instructions using the MediaTek (MTK) SP Flash Tool:
- Download and Extract:
- First, download the correct firmware package.
- Then, extract the ZIP file into a dedicated folder on your computer.
- Install the Required Drivers:
- Make sure both the VCOM Drivers and Oppo USB Drivers are installed on your PC.
- Launch the SP Flash Tool on your computer. If you don’t have it yet, you can download the latest version of SP Flash Tool for Windows or SP Flash Tool for Linux. You can also find a complete guide on how to use SP Flash Tool.
- Load the Scatter File:
- Click on the “Scatter-loading” button. Navigate to where you extracted the firmware and select the “scatter.txt” file.
- Connect Your Device:
- Turn off your phone completely.
- Connect your device to your PC using the USB cable. The SP Flash Tool should recognize your device automatically.
- Start Flashing:
- Click the “Download” button to begin the flashing process.
- Keep your device connected and do not interrupt the process until it’s finished.
- Wait and Reboot:
- Once the flashing is complete, disconnect your device.
- Power on your device. It should now boot into the new firmware.
Missing IMEI or Corrupt Baseband After Flashing?
If you notice missing IMEI or a corrupt baseband after flashing, try these steps:
- Check Drivers: Make sure you have the Mediatek CDC Driver and MediaTek (MTK) drivers installed correctly.
- Use an IMEI Repair Tool: Tools like SN Write Tool or Maui Meta for MediaTek can help restore your original IMEI. You can find more details on how to use Write Tool or Maui Meta.
- Run the Repair Tool:
- Connect your device to your computer.
- Enter your original IMEI numbers for both SIM slots.
- Click “Start” to begin the repair process.
- Restart Your Device: Once the process is done, reboot your phone. You can check your IMEI by dialing *#06#.
Video Guide: How to use Maui META to repair IMEI
Credits: https://www.youtube.com/@mhgsmclinic
Common Issues and Solutions
- Device Not Recognized by PC:
- Double-check that all necessary drivers are installed correctly.
- Try using a different USB cable or port on your computer.
- Boot Loop After Flashing:
- If your device gets stuck in a boot loop, try booting into recovery mode and performing a factory reset.
- Flashing Errors:
- Ensure you’ve selected the correct scatter file and that the firmware version matches your specific device model.
Frequently Asked Questions (FAQs)
Q1: Will flashing the firmware erase my data?
A: Yes, flashing the stock firmware will reset your device to its factory settings. It’s essential to back up your data before you begin.
Q2: Is this firmware compatible with other Oppo models?
A: No, this Oppo A55s CPH2309 firmware is specifically for that model. Using it on a different phone could cause serious problems.
Q3: Can I downgrade my firmware version?
A: Downgrading firmware is generally not recommended. It can introduce security risks and lead to compatibility issues.
Q4: What should I do if I encounter an FRP lock after flashing?
A: If you face a Google account lock after flashing, you can use our free Android apps launcher to quickly resolve the issue.
Q5: Are custom ROM options available for the Oppo A55s CPH2309?
A: This guide focuses on the official stock firmware. For custom ROMs, please check our Custom ROMs page, or look at trusted tech forums like XDA Developers, or resources like Beebom.
Conclusion
By carefully following this guide, you can safely flash the official stock firmware onto your Oppo A55s CPH2309. This process will help restore optimal performance, stability, and security to your device. If you run into any problems or have more questions, feel free to leave a comment below or reach out to our support team.
Stay up-to-date with the latest firmware releases and tech tips by subscribing to our newsletter or following us on social media.
Disclaimer: Flashing stock firmware is done at your own risk. Please follow the instructions precisely to avoid any potential damage to your device.
