Wio LTE Cat.1 (US) not sending SMS

I am trying to use the Wio LTE (us version). I registered the SIM with Twilio and it shows as Active in the status monitor. I’ve had trouble finding a good board under Arduino IDE Board Manager but was able to find Wio Tracker which seems to compile, load and execute OK.

When I run the example sketch, it seems to run but I never get the sample Text message. Phone number is correct. The SerialUSB messages come through and say that Power On, Network Ready and Send OK. but no SMS message comes through.

Any idea why the SMS messages aren’t sending? Thanks.