Device and Method of Handling Radio Resource Control Connection Resume Procedure

A communication device for handling a radio resource control (RRC) connection resume procedure, comprising:

• a storage unit, for storing instructions of:
• establishing a RRC connection with a network;
• suspending the RRC connection, when receiving a RRC message for suspending the RRC connection;
• resuming the RRC connection with the network, when initiating a service request procedure;
• transmitting a first EXTENDED SERVICE REQUEST message comprising a service type information element (IE) to the network after the RRC connection is resumed, if the service request procedure is initiated for a packet switched (PS) service and the communication device is required to transmit an IE related to the PS service other than the service type IE;
• and
• a processing circuit, coupled to the storage unit, configured to execute the instructions stored in the storage unit.