Both great radios, I have 918 since 2018, and two weeks with Xiegu x6100, I like both really much. 918 super variable, I like the NR, and I use the RF gain in 19, that spot gives me perfect blend between background noise and signal. I haven't tested Xiegu outdoor yet
Nobody will receive you as your microphone is not connected you, from the display you are in Digital mode and the RS-918 is supposed to get the audio via the usb from the computer... long press the RIT button until you get Mic on the display instead of DIG ;)