@david_ten Not a native speaker of Persian but I did speak that language during the many years I spent in South Asia. I never heard the word "muck" used for foreigner. Usual words were "khariji" or "ferangi".
Consulting my Hobson Jobson dictionary, it appears the expression has Malay roots.
Oppo was one of many Chinese firms producing consumer electronic goods that was implicated in the use of Uighur slave labor not long ago. I personally have no desire to own anything produced by them. (And yes, I do know where my iPhone was made, thank you.)
