[SHIJILFONOTLY]

Two Types Of Imei Null And Base Band Unknown Problems With Samsung Phones
One Is Software And Second Is Hardware

Software:When Lost The Efs Data Phone Show Imei Null And Base Band Unknown

What Is Efs?
Encrypting File System
Efs Inside Nvm Data,Imei,Base Band Data,Wifi And Bluetooth Systems Etc........

How To Damaged Efs Data?
When We Make Wrong Flashing,While Flashing Used Wrong Pit File,Downgrading Etc........

Wrong Flash:Wrong Model Flash File Use To Flash
This Time Phone Boot Going To Damaged(Hard Bricks),Some Time Phone Hanging Samsung Logo(Soft Bricks) Etc......
Soft Bricks Phone Flashed Again With Correct Files Phone Will Alive But Efs Surely Damaged
Hard Bricks Phone Need Repair Boot With Jtag

What Is PIT?
Partition Index Table
Wrong Pit:Wrong Pit Means Every Samsung Phones Used Internal Memory(EMMC),When We Used Re-Partition Option While Flashing,We Used Unsupported Pit Emmc Partition Will Be Damaged Also Damaged Efs

How To Repair Efs?
3 Way To Repair Efs
1st Is Via Adb Mode Like(z3x)
2nd Is Download Mode Like(spt,bst Dongle,octopus etc..)
3rd Is Via Jtag(GPG eMMC,easy jtag etc..)
I Think Efs Repair Good For Via Download Mode.
Just Reset Or Rewrite Suitable Efs.
Now Phone Efs Is Repaired Sucessfully
But Now Imei And Serial Number Damaged
Repair Imei And Serial Supported Box

After Reset Or Rewrite Efs Phone Imei Null And Base Band Unknown?????
Problem Surely Hardware Fault.
But Onething 1st And 2nd Way Not Sucessfully Repaired Efs We Also Try To Write Efs With Jtag
Some Times(Not 100% Sure)Repaired Efs Data

Still Imei Null And Base Band Unknown?????
100% Sure Cause Is Hardware

Hardware:-Mostly Damaged RF-transceiver-IC
But Remmmber You Must Check Usb Port Some Times Bad Usb Also Make This Problems