G925a write cert imei: 350000000006????

Hello GCG Family, I just purchased the GC Pro Key recently and was wondering as to why the WRITE CERT function did not work correctly? I searched the forum and couldn’t find an answer to my issue. I wrote the certificate and the IMEI was 3500000000006 after completion. What must I do to complete? Why isn’t it working?

I do not have a UART port, only USB. Please assist me, anyone. Thank you!