Content of the SMS message that will be sent to the end user.
The maximum length of a short message text is 160 characters using the default GSM 03.38 alphabet. If you use any character that is not in the default alphabet, the message will be encoded in Unicode and will be divided in segments of a maximum of 70 characters each. For example, if you include an emoji in your message and the message is 150 characters long, it will be divided into three segments: the first one with 70 characters, the second one with 70 characters and the third one with just 10 characters.
You will be charged per segment, not per message.