Where did you read that it was possible to upload code to the Arduino from an Android smartphone?
I am nobody's "bro".Learn to write proper English.If there is such a tutorial, perhaps contacting the author would be the better approach..
Have you checked if the note 8 can act as a USB host? Hook-up the interface cable that provides the type A to the Note 8 and plug a memory stick in at the other side. Is it recocgnized? If not, the Note 8 can not act as a USB host.I have that problem with my TAB3 7"; my wife's S4 is OK.If it fails, you can give up. If it does not fail, it's more than likely the 340 that is not supported in which case I agree with ieee488.