If this is a controller-based RAP, the following information is useful, and will help us determine
a few important facts, firmware version, whether a driver is loading or not, and if the dial is actually happening.
show ap debug usb ap-name <ap-name>
If this is an IAP based RAP3, please take a look at the following to determine the status:
show cell config
show cell status
show log pppd
show log lte
Further debugging should be carried out via an Aruba Support case.