IMEI writing tool for your android device.
if you are facing problem “no IMEI” number after flashing your mobile it means your IMEI files are gone corrupt. it is necessary to make backup of your all data and system before flashing. so if face any problem in future then you can revert back with backup that you created earlier.
but what to do now if you haven’t make backup before flashing your mobile.
so you can use IMEI writing tool to write your original IMEI on you android mobile.
Download from here