How do I update the device to the latest version?

When you want to update the firmware, you have 2 method.First,you can turn on Wi-Fi function in Settings to connect to Wi-Fi hotspot you are using nearby, and then click the "upgrade" option in the device.

Second, you can follow the previous step to connect the printer to the computer with USB cable and then click the update firmware button in the "tools" menu.(note that not all devices support both of these methods, but at least one of them does.)