What does the CONT-001 Error mean?
If a message you sent is not delivered to the end device and returns a CONT-001 error code, this means that the carrier has rejected the message as an invalid destination address. This could mean the number is not in the numbering plan (area code does not exist or the number is just invalid) or the number is not enabled for messaging (like a landline). Additionally, for Toll-Free messages to T-Mobile, this could also mean the user has opted to block all text messaging.