If your Iridium GO! exec will not power on or boot up please check the following:
The battery is charged. Fully charge the device using the USB-C wall charger plugged directly into a wall power socket. Plug the USB-C cable into the second USB-C port on the device as shown below.
Lift the internal antenna.
Tap and hold the power button for up to 15 seconds.
If you are still unable to power on the device please reset the Iridium GO! exec.