patch deprecatedhttps://api.phone.com/v4/accounts//sms/
[DEPRECATED; use Messages] Phone.com’s standard phone service lets you send and receive SMS messages using your Phone.com numbers. The Phone.com API extends this functionality, letting you send SMS messages from your application (through your phone number and our API server) to your users. You can also use the API to retrieve the history of sms sent from / delivered to your account.
Update the is_new parameter in a sms record.