Guide last updated: 2025. Tested on CPH1701 with ColorOS 3.2 (Android 6/7).
: Removing the Google Account lock after a factory reset.
This is where the Firehose protocol comes in. It allows the computer to communicate directly with the eMMC or UFS storage chip on the motherboard via the EDL (Emergency Download) mode. Essentially, it gives the software "superuser" access to the device's storage, allowing for the writing of partitions that are otherwise locked or inaccessible.