: Open the application from the desktop shortcut.

: During the initial prompt, select English .

: Use WinRAR or 7-Zip to unpack the .rar archive. 3. Installation Steps

: Right-click the .rar file and select "Extract to RT809H_20210701_ENG/".

: If you cannot access the official site, reputable technician forums like GsmForum or BadCaps often host mirror links for the .rar file.

While you are looking for the July 2021 version, the RT809H software frequently receives updates to support new IC chips. You can usually check for the latest version within the software via or by visiting the manufacturer's forum regularly.