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A Dual SIM 4G Router is a networking device that allows you to connect multiple devices to the internet via two separate SIM cards, which can be useful for businesses or individuals who need a backup internet connection. This type of router can also provide load balancing, where the router can distribute the internet traffic between the two SIM cards for better performance.

A 4G router with an external antenna is a networking device that has an external antenna port, which can help improve the signal strength and stability of the 4G connection. By using an external antenna, the router can receive a stronger signal from the cellular tower, which can result in faster and more stable internet speeds.

Combining both features, a dual SIM 4G router with Ethernet can provide a reliable and fast internet connection, even in areas with poor cellular coverage. This type of router is ideal for use in remote locations, or for businesses that require a backup internet connection.