This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a dual registration mode and a dual receive mode using a single radio for wireless communications. A UE may determine that a wireless communication network supports the dual registration mode and dynamic spectrum sharing (DSS). The UE may establish a first connection with a first base station using a first radio access technology (RAT) of the wireless communication network. The UE may determine, based on one or more parameters associated with the DSS, that a second RAT of the wireless communication network has a second operating frequency band that overlaps a first operating frequency band of the first RAT. The UE may establish, via the second operating frequency band, a second connection with a second base station using the second RAT based on the dual registration mode and the DSS.