Shall we get back to inter-PLMN handover? Nguyen, thank you for the reference on inter-PLMN handover that you’ve given before. I went quickly throu it. (3GPP TS 22.129 version 5.2.0 Release 5) The spec leaves many issues open but it states (Annex A ) that if handover request is accepted by target PLMN and the call continues in adjacent PLMN, subscriber location information in HLR remains unchanged. After inter-PLMN handover, anchor MSC located in previous PLMN continues to control a call. When the call is over, LU takes place.