: It is the most reliable method for moving to an older version of OxygenOS or ColorOS.
MSMDownloadTool v186 restores the device to factory state, including locked bootloader. You can simply re-unlock via fastboot oem unlock after the first boot. No permanent changes. msmdownloadtool v186 better
: Installed Qualcomm HS-USB QDLoader 9008 drivers are mandatory for the PC to recognize the phone in EDL mode. : It is the most reliable method for
: The device must be connected in EDL mode, typically achieved by holding Volume Up + Volume Down simultaneously while connecting it to a PC. No permanent changes
It is the nuclear option—capable of reviving devices that won't even turn on.
: Check Windows Device Manager; the phone must appear as Qualcomm HS-USB QDLoader 9008 . If it shows as QHSUSB_BULK , the drivers are not correctly installed. Version Comparison & Compatibility v1.86 (Legacy) Modern Versions (v4.0+) Login Requirement Often bypassed/offline Requires Oppo/OnePlus credentials Best For Oppo F3, F5, A57, early Realme OnePlus 8/9/Nord series OS Compatibility Windows 7, 8, 10 Windows 10, 11 Stability High for older SoC Optimized for newer UFS storage
: Unlike the latest versions that require authorized company login credentials, v1.86 often works offline when used with an activation crack or specific "Others" mode.