Issue description
If your A2 shows "Not Connected" even after the 4G module(Link Module) is installed, please refer to this article for troubleshooting steps.
Troubleshooting
Step 1. Please check if the Link Module is securely installed and if the connections are loose; try unplugging and re-plugging it.
Step 2. An unstable mobile network may cause the Link Module to disconnect; try restarting the robot.
Step 3. If the issue still cannot be resolved, please contact our after-sales team.