If you have root in your device and want to install update, without loosing it.
Download OTA update (zip file) to your phone
open flash fire
choose flash zip/ota
^catatan:^ Apabila terdapat Update Firmware terbaru oppo, silahkan flash lg menggunakan Flash Fire ini, tanpa downgrade lagi, tinggal rampok versi terbarunya di situs oppo, lalu flash dg Flash Fire, jangan menggunakan OTA atw Recovery bawaan oppo, supaya Binarry SU nya tidak hilang…