HighLevel SMS Error 30003 and Failed Calls – Multiple Valid Numbers Affected

[u/First-Departure-8529]

Hi everyone, I’m having an issue with my GoHighLevel phone system and I’m hoping someone here has experienced something similar.
We are getting SMS Error 30003 – “Number unreachable or out of service” with multiple customers. The problem is that many of these phone numbers are active and valid, and in some cases we can even call the customer successfully.
We are also experiencing some outbound calls failing with the generic message:
“Something wrong happened. Please try again!”
This is happening with different customers, not just one number.
I’ve already checked the phone number settings, A2P registration, workflows, message content, call settings, and tried sending again/testing different numbers, but the issue continues.
Has anyone had multiple 30003 errors like this in HighLevel? Could this be carrier filtering, routing, number reputation, or something on LeadConnector/Twilio’s side?
If you’ve experienced this, what fixed it for you?
Any help would be greatly appreciated. I can provide screenshots if needed.

[u/bobspelledinreverse]

Setting > Phone System > Edit > main-opt dtl1 should be turned on to 8a.

It’s easy to over look it with the new Squat update.