User equipment (UE) for managing out-of-order packets is provided. The UE may include a radio frequency (RF) signal processing device, a management module, a filter module and a multi-reorder queue circuit. The RF signal processing device may receive a plurality of packets from a network node. The management module may collect network information of the network node and application information and generate a plurality of filter rules according to the network information and the application information. The filter module may receive the filter rules from the management module and allocate a plurality of out-of-order packets of the packets to different reorder queues according to the filter rules, wherein each reorder queue corresponds to a different reorder timer. The multi-reorder queue circuit includes the reorder queues. The multi-reorder queue circuit determines how to push each out-of-order packet to its corresponding application through a TCP/IP stack.