Wireless communication techniques that include network service discovery and selection techniques in wireless communication systems are discussed. A UE may trigger a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure. The first registration procedure may be used to register the UE in a first wireless communication network associated with a first radio access technology (RAT). The UE may also trigger a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. Other features are also described.