Question: what is the difference between stand-alone (sa) and non-standalone (nsa) 5g nr?
Answer: If the radio part is 5G New Radio (NR) and the core part is 4G Evolved Packet Core (EPC); it is called Non-Stand Alone (5G Radio + 4G Core = NSA). If the radio part is 5G NR and the core part is 5G core; then it is called Stand Alone (5G Radio + 5G Core = SA).