help repairing imei samsung clone with imei null

How to fix this?
I need to write its email, it got lost after flash

Code:

Connecting...
Phone Detected.
Reading Phone Info...
Manufacturer:    samsung
Model:        SM-N900
Build ID:        JSS15J.N900UBUBMJ2
Hardware ID:    MT6582
------------------------------------------------------------------------------------------
Linux version 3.4.5 (zhanghongqiang@yaocong-desktop) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP PREEMPT Mon Mar 31 16:08:00 CST 2014
------------------------------------------------------------------------------------------
Checking root...    OK!
Initializing...
------------------------------------------------------------------------------------------
Imei:        null
RichEdit line insertion error
Operation Done.