You must use the original 45W USB-C power adapter. If you are using a standard phone charger (15W), the gateway enters low-power mode and disables firmware updates.
T-Mobile locks down their firmware heavily. There is no public download link.
Instead, it's a device that Nokia primarily sells to internet service providers (ISPs), who then brand and distribute it to their customers. As a result, the process is not as simple as downloading a file from Nokia’s website. nokia fastmile 5g gateway firmware update link best
Before we dive into the links, you need to understand the landscape. The Nokia FastMile is a "Carrier Grade" device. Unlike a standard Netgear or Asus router you buy at Best Buy, Nokia does not own the software relationship with you—your Internet Service Provider (ISP) does.
: You can check on the status of an OTA update by observing the LED light on your gateway. A solid white blinking light usually indicates that a software update is in progress. Do not turn off or unplug your modem during this time . You must use the original 45W USB-C power adapter
Because firmware is often customized for specific network carriers, it is best to visit your provider's official support page: Changing the modem login password on iiNet modems | iiHelp
If available, click to see if the gateway can pull an update directly. There is no public download link
If you want to know what the "best" firmware does, use this search string on Google:
Before you search for "Nokia FastMile 5G gateway firmware update link best" again, ask yourself: