IMEI numbers. You can view it using the MiFlashPro software (any Mi account is fine),
set the device into the Recovery mode, connect and look at IMEI. If IMEI is empty - update / downgrade the firmware.
If it did not appear after the update / downgrade - disassemble the device, and the sticker with IMEI will be okay as well.
Upload Images here https://prnt.sc
We Need 2 Photos of Lock Device
Press 8 Times on Lock Icon See Photo http://prntscr.com/oe3t1s
after Pressing 8 Times this Code will Appear See Photo we need this http://prntscr.com/oe3vr9
Also Need This http://prntscr.com/oe3xb9
2 Photos + Imei
submit ur phone screen shot somewhere and give link in the Required field