A few days back, DigiTimes reported that Nintendo could potentially entering the smartphone race. Well today, I found a patent that might be backing up that claim. Nintendo filed back in 2014 (mind you phones take years to make) the follow:
An example portable electronic device includes user controls; a display; a camera configured to capture images; wireless communication circuitry for mobile wireless communications; and a processing system configured to control the display to display images captured by the camera. An image displayed on the display is stored in memory in response to an input to the user controls, and the wireless communication circuitry, under control of the processing system, transmits the image stored in the memory while the processing system executes a program.
Please note that this could be for Nintendo Switch receiving a 4G LTE or 5G model down the line, but with recent claims of a Nintendo phone, that seems more likely.