Hello,
It is always recommended to use the latest firmware versions on our devices. In your case, the latest firmware version is RUTX_R_00.07.07.1. As a first step, I suggest you upgrade the device.
You can change the access point name via the WebUI by navigating to Network → Wireless → SSIDs and pressing ‘Edit’ button. More information can be found here.
To obtain internet from a WiFi network, navigate to Network → Wireless → SSIDs and press ‘Scan 2.4/5GHz’. Select the network you want to connect to and connect to it. Detailed instructions can be found here.
Our devices come equipped with a failover function designed to serve as a backup for your primary WAN connection in the event of a failure. Through the WebUI, you can configure failover settings according to your preferences. When failover is enabled, our devices continually check the internet connection by pinging a specified server (default is 8.8.8.8 and 1.1.1.1). If the primary interface (WiFi) experiences a failure (no response from the server while pinging), the secondary interface (Mobile) is automatically activated. Once the primary interface recovers (starts receiving pings again), the system reverts to using it as the main connection.
More information about failover can be found on our wiki page.
Please let me know if you have any more questions regarding this topic!
Best Regards,