A communication device for handling an evolved packet system, EPS, bearer context, comprising: at least one storage device; and at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute, instructions of: transmitting a first protocol data unit, PDU, Session identity, ID, to a long-term evolution, LTE, network; receiving a first EPS bearer ID identifying a first EPS bearer, from the LTE network, wherein the first EPS bearer ID is associated with the first PDU Session ID; configuring a first data radio bearer, DRB, associated to the first EPS bearer ID, with the LTE network; communicating data via the first DRB with the LTE network; connecting to a new radio, NR, network and disconnecting from the LTE network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the NR network and disconnecting from the LTE network; configuring a second DRB associated to the first PDU Session ID, with the NR network; connecting to the LTE network and disconnecting from the NR network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the LTE network and disconnecting from the NR network; and configuring a third DRB associated to the first EPS bearer ID, when connecting to the LTE network and disconnecting from the NR network. at least one storage device; and at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute, instructions of: transmitting a first protocol data unit, PDU, Session identity, ID, to a long-term evolution, LTE, network; receiving a first EPS bearer ID identifying a first EPS bearer, from the LTE network, wherein the first EPS bearer ID is associated with the first PDU Session ID; configuring a first data radio bearer, DRB, associated to the first EPS bearer ID, with the LTE network; communicating data via the first DRB with the LTE network; connecting to a new radio, NR, network and disconnecting from the LTE network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the NR network and disconnecting from the LTE network; configuring a second DRB associated to the first PDU Session ID, with the NR network; connecting to the LTE network and disconnecting from the NR network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the LTE network and disconnecting from the NR network; and configuring a third DRB associated to the first EPS bearer ID, when connecting to the LTE network and disconnecting from the NR network. transmitting a first protocol data unit, PDU, Session identity, ID, to a long-term evolution, LTE, network; receiving a first EPS bearer ID identifying a first EPS bearer, from the LTE network, wherein the first EPS bearer ID is associated with the first PDU Session ID; configuring a first data radio bearer, DRB, associated to the first EPS bearer ID, with the LTE network; communicating data via the first DRB with the LTE network; connecting to a new radio, NR, network and disconnecting from the LTE network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the NR network and disconnecting from the LTE network; configuring a second DRB associated to the first PDU Session ID, with the NR network; connecting to the LTE network and disconnecting from the NR network; keeping the first EPS bearer ID and the first PDU Session ID, when connecting to the LTE network and disconnecting from the NR network; and configuring a third DRB associated to the first EPS bearer ID, when connecting to the LTE network and disconnecting from the NR network.