Default [Q] MT6572 IMEI null problem

Hello guy..!
I have a problem with my my former android v4.2.2 tecno s3, which later I updated it to android m3 v4.2.9 tecno m3 custom rom.
my device launched properly, but there is the problem with SIM card reading whereby there is a notification which say No sim card detected,
I tried to connect to MTK droid & tools and it shows that both IMEI 1 and IMEI 2 are null.
I need your help since I appreciate your skills and effort in helping others.
How to solve this problem??