Questions about TP-Link Archer NX600

No, the external antenna is not included. Antenna must be purchased separately, they are usually universal, but you only need them if there is no reception at the router, otherwise the internal antenna works better. Kind regards

I'm not completely certain about the CPU and RAM specifications for this router. The information I have does not fully address these details. However, it is known that the router supports 5G connectivity with multiple cellular protocols, including LTE, and features Wi-Fi 6 technology for enhanced wireless performance. For precise details on the CPU, RAM, and 5G broadband module, I recommend checking the manufacturer's official documentation or contacting their support directly.

Yes, this model of router supports the insertion of a 5G SIM card. It has a slot for a Nano-SIM card, which allows you to use 5G/LTE networks.