Guys read this
http://www.gsmarena.com/oppo_find_5_wont_see_android_44_kitkat_update-news-9432.php
Oppo find 5 don't receive kitkat officially..Oppo said that Qualcomm don't send them binary for 4.3/4.4 support..
maybe ,as i think for xiaomi,they (oppo) don't buy some type of license to use...