Once you have the APK installed and the config file downloaded, follow these precise steps.
You need an .xml config file matching your phone model.
File naming example: S23U_LMC8.4_R18_v5.xml or Mi11Ultra_medium.xml gcam lmc 84 r18 config file download install
⚠️ Do not rename the config file with spaces or special characters. Use underscores or dots.
GCam LMC 8.4 R18 does not automatically create the folder. You must make it manually. If the folder doesn’t exist, create it exactly
Path should be: Internal Storage > LMC8.4 > Configs
🔁 If nothing happens after double-tapping, go to: Settings → Configs → Config loader → Double-tap action → Choose “Configs selector” Once you have the APK installed and the
Before you can install a config file, you must find one that matches your specific device. Using a config file designed for a Samsung Galaxy on a Xiaomi device will result in poor image quality or app crashes.
Here are the three most common problems and fixes.
| Problem | Likely Cause | Solution |
| :--- | :--- | :--- |
| Double-tap does nothing | Wrong folder path or no configs found | Verify Internal Storage/LMC8.4/Configs/ exists exactly. Case matters. |
| App crashes after loading | Config file mismatched with your device/Android version | Try a different config. Ensure you are on R18 APK, not R15 or R19. |
| "Failed to load config" error | File is corrupted or not valid XML | Re-download the config. Open it in a text editor – it should start with <?xml version="1.0"… |
| Lenses not switching | Config was designed for a different sensor | Find a config specific to your phone model or learn to manually map lenses in Settings > Advanced > Auxiliary camera. |