Update Message for extension

Phone.com’s standard phone service lets you send and receive SMS/MMS messages using your Phone.com numbers. The Phone.com API extends this functionality, letting you send SMS/MMS 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/MMS sent from / delivered to your account.

This service is used to mark a message to read, by setting when it was read, or unread for extension

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