actually, more accurately, this seems to be the issue, from the other more general 6300 thread.
Luxferre schrieb am Donnerstag, 21. Januar 2021 um 09:26:01 UTC+1:
Thanks,
From Yair's dumps, IMEI storage format in 6300/8000 became clear. The IMEI numbers are stored in a raw partition called rf_nv, under the addresses 0x88 and 0x108 for SIM1 and SIM2 respectively (and you can find the IEMI (IMEI backwards) signature at 0x80). They are represented in Qualcomm's standard format: prepend 80a to IMEI, split into pairs and invert each pair to get the written bytes. In theory, it's enough to alter these blocks in rf_nv partition and then erase modemst1 and modemst2 to apply the IMEI change.
P.S. Looks like Wallace Toolbox and libWallace will have to be completely rewritten for 6300/8000 devices once they are rooted.