The (or similar .ofp-based MSM tools) is the ultimate, low-level unbricking utility for specific Qualcomm-based OnePlus devices (notably used for the OnePlus 7T Pro 5G McLaren [tmo] or similar 2019-2020 devices). It flashes the stock OxygenOS factory image directly to the device via Qualcomm Emergency Download Mode (EDL).
Use a high-quality USB-C cable, preferably the original OnePlus cable. Phase 2: Launching and Configuring the Tool msmdownloadtoolv2071rcsm full
The flashing process will begin. Do not disconnect the cable. The (or similar
MSMDownloadTool v2.0.71 RCSM Full: Complete Unbricking & Flashing Guide msmdownloadtoolv2071rcsm full