UDH= 0500030F0202

050003 = this part can be fixed
0F is a reference-ID for the whole concatenated SMS and can be changed if you  like)
02 = The number of SMS:s that the concatenated SMS contains
02 = The number in the order of the SMS (01 for the first, 02 for the second, 03 for the third etc.) So this is number two in the concatenated SMS.

message header for message number 1 of 4:

BINHEAD=X0201000106050003010401

the encoded body:

BINBODY=5468616920466973682043616B65732028546F64204D616E20506C612920666F72203420706572732E205072657061726174696F6E2074696D653A2033306D696E0A0A496E6772656469656E74733A0A2D20466973682063616B653A3435306720776869746520666973682066696C6574730A2D33207473702072656420637572