Default Huawei e5776 imei

I have a very weird problem with this device.
Recently bought one off another person. I tried to flash it but the flash code is wrong.
After reading that the flash code should not be wrong and derived from the imei, i realize it is highly possble that the imei on the back may not be the imei of the mobo itself. Would like to ask if anyone knows how to check the imei of the device via any software?