Guide: Extraction of Ocdt.Img from OnePlus Device

OxygenOS, despite its recent changes, is still a fan favorite compared to its Chinese counterpart, ColorOS. Many users switched from ColorOS to OxygenOS for a smoother, less bloated experience. But even with OxygenOS, some users encounter frustrating issues like auto-brightness problems and screen flickering. The solution? Flashing the ocdt (Optical Character Display Technology) to your device!

While flashing the entire firmware just for that one file is a hassle, you can directly extract the ocdt.img from your OnePlus device and share it with others. Let’s dive into how.

How to Extract ocdt.img from Your OnePlus

Root Your Device (Magisk): Start by rooting your OnePlus device using Magisk. You can find detailed instructions on how to do this online.

Install Android SDK Platform Tools: Download the Android SDK Platform Tools from https://aiomobilestuff.com/download-android-sdk-platform-tools-all-os/ and extract the folder on your computer.

Enable USB Debugging: Go to Settings > About Phone and tap “Build Number” seven times. Enter your password when prompted to enable Developer Options. Now, go to Settings > Developer Options and enable USB Debugging.

Connect Your Phone: Plug your OnePlus device into your computer with a USB cable.

Open Command Prompt: Open the platform-tools folder and type cmd in the address bar. Press Enter.

Connect to Your Device: Type adb devices in the Command Prompt and press Enter. Your device should appear.

Access Shell: Type adb shell in the Command Prompt and press Enter.

Grant Root Access: Type su in the Command Prompt and press Enter. You’ll see a Magisk request on your device. Tap to grant access.

Extract the ocdt.img: Enter these two commands in the Command Prompt, one after the other:

dd if=/dev/block/bootdevice/by-name/ocdt of=/sdcard/ocdt.img

exit

Find the File: You’ll now find a copy of ocdt.img in the platform-tools folder on your computer, ready to be shared!

Downloading Extracted ocdt.img

We’ve gathered a few ocdt files from extracted firmwares, which you can download below. Remember: only download if it matches the build number of the firmware installed on your device.

• CPH2487_ocdt.img: https://forum.xda-developers.com/attachments/ocdt-img.5926313/

• CPH2449_ocdt.img: https://forum.xda-developers.com/attachments/ocdt_cph2449-img.5905311/

How to Flash ocdt.img on Your OnePlus

1. Move the File: Place the ocdt.img file into your platform-tools folder.

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2. Connect and Enable Debugging: Connect your OnePlus to your computer with a USB cable and enable USB Debugging.

3. Boot into Fastboot Mode: Type adb reboot bootloader in the Command Prompt and press Enter.

4. Flash the OCDT: Type fastboot flash ocdt ocdt.img in the Command Prompt and press Enter.

Important:

• It’s best to include the build number in the file name (like “CPH2487_ocdt.img”).

• Only flash the ocdt.img that matches the firmware on your device. Using an incompatible file could cause issues.

We Hope This Helps!

We’ve tried to make this guide easy to follow. If you have any questions, leave a comment below, and we’ll do our best to assist you.