How does 5G NR-NSA mode work when my device shows an LTE connection?

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If your device shows an LTE connection despite having a 5G SIM card, it might be operating in 5G NR-NSA (Non-Standalone) mode. This is a common and expected configuration where 5G capabilities are added to an existing LTE network. Here’s how this technology functions:

• 5G NR-NSA mode means that 5G is deployed on top of LTE. This setup leverages the established LTE infrastructure while adding 5G NR for enhanced performance.
• In this configuration, LTE acts as the anchor or master. It is responsible for critical network functions such as signaling (RRC, mobility management), providing coverage fallback if the 5G NR signal is weak, and handling initial access and the control plane.
• The 5G NR component provides additional data capacity via dual connectivity with the LTE anchor, boosting overall bandwidth and speeds.
• The specific 5G carrier band (e.g., Band n1 or Band N78) used by the device can change dynamically based on network conditions. This dynamic selection is normal behavior in NSA deployments, as the network optimizes for the best available NR band alongside the LTE anchor.