sms sends the message to destination.
The string that specifies the destination phone number. Phone number should be of the following format: (country code)(phone number) e.g. To send message to a San Diego, USA number, it should look like 18585551212.
The message that needs to be sent.
This specifies the number from where message is shown to be originated from (i.e. caller-id). By default, the callerId of the user, if available, is passed to the destination.
If successful, it returns SUCCESS.
On failure, it will return one of the following strings: