Your phone probably is hard bricked, like my y550. For restore it we need an emmc backup from an working phone(in my case Y550-L01).The procedure is simple and described here: https://forum.xda-developers.com/ascend-g6/help/request-emmc-backup-g6-...
Why there is no android m or android n builds for doogee f5?
what is the best CM12.1 Kernel without the 98%-charging issue?
Thanks in advance
There is no y550 download in octo n lineage os but there is update 2/10
My bad i used bff kernel instead of soviet 4