IMEI repair?
 

hi, i own a Riffbox

i have a Samsung S7 sm-g930f that came with nougat 7 pre installed.
i have tried to downgrade it to 6.0.1, it failed and corrupt my imei (apperently the efs partition is corrupt),
i have reflash it to the stock rom 7 nougat. but it stays the same.
i have tried many tools and ways to repair the imei with no luck.


its a dual sim phone
and the imei is now 000000.....
is that possible to repair it with a riffbox ?

its a single sim sorry.
but the model number says its FD.
even tho i flashed it with F rom. AP_G930FXXU1DQB7_CL10422490_QB12445332_REV00_user_ low_ship_meta.tar
https://i.imgur.com/Ar6wPaC.png

whats writen on the back of the phone is SM-G930F 32GB

and the sim try looks like this.
https://images-na.ssl-images-amazon....1Rw3D1CJiL.jpg

more so,
isnt it possible to manual edit the imei in nv_data.bin via hex editor ?
if its possible which offset i need to look for?
(the .nv_data.bak is not present/does not exist)

i have purchased chimera mobile phone utility hoping for it could help me but that wasnt the case. it failed to repair/edit the IMEI.
but it as write CERT option. ( the read codes and read cert , did not work)
whats the best option for me?
isnt possible to get a cert from somehwere and write it to the phone ?

INSTALL TWRP AND RESTOR EFS FILE VIA RECOVRY THIS EFS IS FOR G930F DUOS
Efs Repair Partition file Galaxy S7 G930F/ds

Sm-g930fd = sm-g930f

thanks for replying.
but my baseband is ok. its not corrupted .
only the efs is.