Nguyen, thanks for the specs reference for Inter PLMN Handover. Will go thru them and get back. But I think HPLMN1 MSC-A would anyway come to know of the handover request and can check the Inter PLMN roaming subscription of the MS. VPLMN2 MSC-B would just check whether handover request from MSC-A is to be entertained or not.
Could you pl elaborate, what is the issue/concern you see here?
Are you interested in knowing the exact sequence of operations or you find an issue coz of which you see it not happening.