Hello. I'm trying to send a location update message using IMSI, but I never receive a reply from the BSC (Authentication request, identity request or location reject). If I change the location update identity using a TMSI, then I receive an Authentication Request or an Identity Request. Could be the IMSI format worng? The used IMSI is valid. I copy the string containing this one into the subscriber imsi field. Should I use an encoding function? I hope the issue is clear. Thanks in advance for support.