A question about Samsung emmc repair
 

Hello, I have a Samsung sm-j400f with a damaged emmc I have a replacement but no access to backup files suchlike (efs cpefs m9kefs1-2-3 radio), couldn't find anything in the internet either but I found a 8GB dump so my question is will the 8gb dump have the back files or do I need to get them from another phone??
Any answers will be appreciated and thank you in advance

without original efs partiton you lost original IMEI/SN
you can try files from same device and after you need restore IMEI via patch (use Samsung Tool, etc)