Note:
if serial after repairing become to 0499xxxxxxx, then, this mean Your Phone will done but If it become Blank this mean it�s a Hardware Problem.
You can also use this file to repair your EFS if you don�t have working phone.
I9100 Good EFS
Samsung-i9100-IMEI-Unknown-Baseband-100-ok-Successfully-Repaired-by-Riff-Box
Note:
if serial after repairing become to 0499xxxxxxx, then, this mean Your Phone will done but If it become Blank this mean it�s a Hardware Problem.
You can also use this file to repair your EFS if you don�t have working phone.
I9100 Good EFS