Fixing IMEI null problem after flashing ROM

Hello,
I have a Lenovo K3 Note (k50t5) that I bought from China.
Since it came preloaded with a lot of bloatware and without an option to update to newer builds from Lenovo, I flashed the Indian ROW (rest of the world) k50a40 version and updated to the latest S121 version.
The problem is that the IMEI got deleted and I couldn't fix it with numerous methods I found in various forums.
I rooted the phone using the CWM method.
I tried using Mobile uncle app, but it doesn't have the engineer MTK option for some reason, only Android.
I accessed engineering mode through the dialer (*#*#3646633#*#*), and tried using AT command but it gave me the common error that it cannot send the command in user mode. Making a space before the + sign just gave me an ERROR, without specifics. I modified the build file from user to userdebug, and now I always get ERROR.
The weird thing is that I get a data connection from time to time, but I can't make phone calls or send SMS. Any help will be greatly appreciated.

S5 IMEI null and Service mode blank

Hello,

I have this problem with my phone and i don't know how to fix it, the IMEI is Null and when i enter "*#0011#" the ServiceMode is Blank !!
I tried to use GS5_EFS_Backup but it doesn't work ! Also the phoe get hot a lot, and when i put it in charge the battery level of charge is stuck in 10% always.
My phone is rooted.
Help me Please.
Thank you

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