To: <sip:+11234567890@test.3gpp.com> From: <sip:+11234567890@test.3gpp.com>;tag=210a54 Call-ID: d57a0b04-785ba328-13a4d876@10.133.202.46 CSeq: 14534 SUBSCRIBE Expires: 600000 User-Agent: IM-client/OMA1.0 DUT-IMS Event: reg Accept: application/reginfo+xml P-Access-Network-Info: 3GPP-...