In the version 20 and above the IMEI is in the Service Menu - About. If you need to get IMEI with the older firmware you can copy it from the 3G modem. Switch off the device before any manipulation.Here is the video instruction for disassembly. https://photos.app.goo.gl/JumFDStcu3SqXv0y2 IMEI is 15 ciphers long.
Customer support service by UserEcho