Camera Quality: The dual-lens processing algorithms are baked into the stock camera app. Third-party apps on custom ROMs rarely match this image processing. Stability and Security
For the BLN-L21, you must ensure the "C-code" (Region Code) matches your device. Common versions include C432 (Europe), C185 (Middle East), and C636 (Asia). Using the correct regional stock ROM ensures your local carrier bands and languages are fully supported. Conclusion official huawei honor 6x blnl21 stock rom better
If your Honor 6X is currently lagging, the solution isn't necessarily a new OS—it’s a fresh install of the official firmware. Flashing the BLN-L21 stock ROM can resolve boot loops, remove malware, and restore the original snappiness of the device. How to Identify the Correct ROM C185 (Middle East)