Dimapl,
Thank you for your attention. You are right that, in the case of ordinary handover within an PLMN, the handover procedure happens first, and MS will make LU after the call is finished. However, in the case when the MS is roaming to another PLMN, the roaming procedure have to processed first in order to check whether the location area of VPLMN is allowed of roaming or not, AND whether the MS roaming subscription has been registered at its HPLMN or not. Is there something conflict in this situation?
Brgds