So the YouTube link is completely removed by xda , I am sorry I broken some rule without knowing it , but I will help fellow members of this device by giving some info, ie , search " oppo f5 cph1727 new security unlock " with name of YouTube channel " technology 666 " , you get the method of opening motherboard, to flash rom, by grounding test point.
I support no illegal activity whatsoever. I shared this video for the purpose of sharing info on flashing rom, since with this device anything is impossible & so there is no development since 5 YRS of its launch. I hope it helps.
Unlock bootloader by readily available mtk client gui , or use some other tool , after unlocking bootloader try installing twrp ( search for it first ) , or else try installing a GSI since no custom rom is available till now.
Sure why not.. I'll upload in night and . I've tried alot of ways to unlock bootloader but failed(rooted boot.img n flash it)(twrp port ) etc...
you can whatsapp me and we will work on this if possible..