Download an App on your xiaomi mi mix, and take a YouTube video of the App Performance. You must have an xiaomi mi mix (you must show this in the video). It will take you about 10 to 15 mins if you have this phone and know how to youtube. You can use another phone to video the XI Mix for youtube if you want. This is a $5USD job for someone with a Xiaomi Mi Mix - don't bid you don't have own this phone. Payment will be only made once the video is uploaded and I have looked at it.
You can also use your Samsung S8+ for the test as well now.