You can send and receive SMS messages using a number that you port to Twilio. For local numbers, this process typically takes an extra 2 hours after the number ports during which time messaging will route on the previous provider.
SMS routing on US toll free numbers ported into Twilio will complete within 2 hours after port completion in most cases; however, in some instances, updating the SMS to Twilio can take 1-2 days on toll free numbers. In these cases, SMS will continue routing through the existing provider.
If you experience any issues with sending or receiving SMS messages outside of these timeframes, please reach out to us.