Use this endpoint to update the failover MMS route for a phone number. You must create the route first by following Create an Inbound Route. You can then assign the created route by specifying its value in a PATCH request.
The phone number to which the failover route for MMS will be assigned. This number must be in 11-digit North American format. e.g. 12065551234.
Object type of the data that you are updating the phone number with. This will always be "route".
ID of the failover MMS route to be assigned to the phone number that you are updating.