A user equipment (UE) is configured to be connected to multiple wireless networks, including e.g., a 5G New Radio (NR) network and an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN). The UE may assign one of the networks with a higher priority for connection. The UE monitors wireless signal metrics to determine if the priority assignment of the networks should be inverted. The UE may monitor the expected data throughput, e.g., determined based on the availability of carrier aggregation, the carrier aggregation order, the multiple in multiple out (MIMO) order, the available bandwidth, E-UTRAN NR—Dual connectivity (ENDC) availability, or quality metrics of wireless signals from one or both wireless networks. The UE may further dynamically select a carrier subscription as the Default Data Subscription (DDS) based on the metrics as well as whether a wireless network associated with a carrier subscription supports ENDC.