4G Dual SIM Backup and Load Balancing are two different network management strategies, although they can both improve network reliability and performance.

4G dual-card backup:

Purpose: Mainly to improve network reliability and continuity. When a SIM card's network has problems, the system can automatically switch to another SIM card to ensure that the network connection is not interrupted.
Working principle: Usually using dual-card dual standby (DSDS) devices, the two SIM cards are connected to different network operators. The system monitors the network status of the main card and automatically switches to the backup card once a main card network failure is detected.
Application scenario: Suitable for scenarios that require high reliability and continuity, such as remote monitoring, industrial automation, and Internet of Vehicles.

Load balancing:

Purpose: Mainly to improve network performance and throughput. By distributing network traffic to multiple links, the pressure on a single link can be reduced and the efficiency of the overall network can be improved.
Working principle: Use a load balancer or router to distribute network traffic to multiple links according to certain algorithms (such as polling, weighted polling, minimum number of connections, etc.). Each link can be a different network operator or a different line of the same operator.
Application scenarios: Suitable for scenarios that require high bandwidth and high performance, such as data centers, large enterprise networks, video streaming services, etc.

Summary:

4G dual-card backup focuses on network reliability and continuity, ensuring uninterrupted network connection through redundant links.
Load balancing focuses on network performance and throughput, improving overall network efficiency by dispersing traffic.
These two strategies can be used alone or in combination according to specific needs to achieve the best network effect.

Now we offer R30 series 4G Dual SIM router for backup, and R32 series 4G Load Balancing router for the different requirements from customers. If you want to learn more information, please leave a message or send mail to service@yinghuaiot.com.