E.Failed to mount /efs (invalid argument) dm verity Error...

Hello i hope everyone can help me

i buy the samsung sm-g920f from a person.
He say the telefon have a firmware problem and i think i can repair that.but now i see this telefon have many Problem and hope anyone can help me.

This Telefon Stuck on Samsung Logo.
I try it to flash original stock rom.
I try to root.
Nothing helps.

In Cwm mode read the telefon
No Support Single -sku
Supported API:3
E.Failed to mount /efs (invalid argument)
E.Failed to mount /efs (invalid argument)
E.Failed to mount /efs (invalid argument)
dm verity Error...

i dont have a efs backup i try it with efs from another s6 phone

i Try to fix that with adb/fastboot
cwm error
update from external storage is disabled
twrp sideload
adb shell error closed.

Please help me

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by aschmitt
3 hours ago
Last post by rogahn.adriana
2 hours ago
Last post by margarete20
1 hour ago
Last post by ksenger
1 hour ago
Last post by billie83
2 hours ago
Last post by jbuckridge
46 minutes ago
Last post by strosin.lilla
4 hours ago
Last post by nadia18
3 hours ago