But when does this happen compared to the LAU : 1s after ? 5s after ? 10s after ? 30s after ? All the time ?
What’s for sure is that this behaviour comes from the MSC/VLR/HLR which is not properly up to date. Unfortunately, I know nothing about NSS 🙂
The TMSI realocation clearly indicates that the VLR has mapped this IMSI to the new LAC. But is the HLR aware of that yet ?
Just brainstorming 🙂