You cannot use the 5g function after unsubscribing from 5gsa

Yes.

5GSA is a 5G network mode. As long as the mobile phone and mobile phone card support 5G, the 5G network can be used normally after unsubscribing from 5GSA.

5gsa private network traffic is a 5G exclusive network model that is re-established on a non-4G basis. In this mode, 5G mobile phones can directly receive 5G signals, and the signals are real 5G signals with high speed and low latency.