I was able to upload firmware (which also seems to have gotten rid of the bootloader because the blue led no longer comes on when I press the MD (mode button) then reset. When I press reset though I dont seem to see anything come through on the TX port of the UART or through the USB which I thought would be where I could do AT commands since I compiled it with the AT_Client project in the drop-down of nRF connect options in SEGGER embedded studio. Also I was uneasy about selecting a target board for build as nRF9160dk_nRF9160ns since I would have thought there would be something like Sparkfun_nrf9160_thing_plus but there is no such option in the drop-down. Any idea on what I’m doing wrong? The hex files seem to upload to the 9160 Thing Plus just fine. Also, the Feather looks slightly different than Sparkfun - should I try the nRF52_adafruit_feather option? Is it the same?