Using tools like the SPD Upgrade Tool (ResearchDownload) to reinstall or upgrade your phone's OS.
Communicating with a "dead" device that only shows up as a "Diagnostic" or "Loader" port in Device Manager. How to Install SPD Driver 200131 UPD spd driver 200131 upd
Open Device Manager on your PC. Connect your device while holding the Volume Down or Volume Up key. You should see a new entry under "Ports (COM & LPT)" labeled SPRD U2S or similar. Troubleshooting Common Issues Using tools like the SPD Upgrade Tool (ResearchDownload)
Removing Factory Reset Protection if you’ve been locked out of your device. Connect your device while holding the Volume Down
You will generally need to install this specific update if you are performing any of the following tasks:
Are you having trouble getting a specific to show up in your flashing tool, or
Essential for "Preloader" or "Download" modes.