Using the falls into a gray area. While owning a device gives you the legal right to modify it (in most jurisdictions), bypassing security to access another person's device is illegal. The tool itself has been targeted by MediaTek for circumventing their proprietary download agents.
You can search for the Free Link MTK Client Tool V5.3 on various online platforms, such as: free link mtk client tool v53
: Essential for the tool to "catch" the device in BROM mode. MTK USB Drivers : Standard drivers for MediaTek device recognition. Windows 10/11 Using the falls into a gray area
: Extract the downloaded ZIP file to a folder on your desktop (disable Antivirus as it may flag the exploit files as false positives). MTK_Client_Tool_V5.3.exe as an Administrator. Select Operation : Choose the desired function (e.g., [BROM] Erase FRP Factory Reset Connect Device Power off your phone completely. Volume Up + Volume Down simultaneously. Plug in the USB cable while holding the buttons. You can search for the Free Link MTK Client Tool V5