Send USSD APDU

Some operator would implement the Send USSD in the STK, the Card vendor need to construct the Send USSD APDU command, here give out a brief sample about the detail of the this APDU command.Fetch      ME –> ICC  : A0 12 00 00 23      ME <– ICC  : D0 21 81 03 01 12 00 82 02 81 83 85 0C 53 65 6E 64 69 6E 67 20 55 53 53 44 8A 08 0F AA 9A CD A6 A2 8D 00 90 00the dissection of the APDU command,      Command Detail : 81 03 01 12 00       Device Identities : 82 02 82 81       alpha identifier : "Sending USSD"  85 0C 53 65 6E 64 69 6E 67 20 55 53 53 44      USSD String Tag, 8A Data Coding Scheme : 0F  USSD String:  AA 9A CD A6 A2 8D 00,   8A 08 0F AA 9A CD A6