Curious if anyone had attempted to utilize the VK-172 USB GNSS receiver yet? It uses the Ublox7 chipset, and is pretty cheap. Found it under several random (Chinese?) brands on Amazon (Wingoneer, HiLetGo, DIYMall, etc). I would assume this would work like any other external receiver that shows up as a COM port (typically using bluetooth as opposed to USB) and sends NMEA messages. Guess you would need an OTG cable to utilize the receiver while also powering your device.
Also curious if this receiver also gives you Galileo tracking? Doesn't seem obvious in any of the reviews.