However, ZIP file can be uploaded with DownG utility, it is able to detect my scooter 3 and upload the file. Thanks for the info. Did you generate your ZIP file with the CFW Toolkit for Pro 2? I'm curious if that enables cruise control as this function is unfortunately absent in the official Xiaomi...

Well I tried but I haven't even been able to get the Mi Scooter 3 to show up in the "select scooter" list of the Android utility.

Though I haven't tried it yet, the Mi Scooter 3 speed limit guide at hardreset.info uses the Pro 2 CFW generator:

Guide: https://www.hardreset.info/devices/xiao ... eed-limit/
CFW Toolkit: https://pro2.cfw.sh/#

Let us know if you're successful!