Test sns phone text sending using python sample from AWS https://docs.aws.amazon.com/code-samples/latest/catalog/python-sns-sns_basics.py.html

test_sns.py

import json
import logging
import time
import boto3
from botocore.exceptions import ClientError

logger = logging.getLogger(__name__)
sns_resource = boto3.resource('sns')


def publish_text_message(phone_number, message):
        """
        Publishes a text message directly to a phone number without need for a
        subscription.

        :param phone_number: The phone number that receives the message. This must be
                             in E.164 format. For example, a United States phone
                             number might be +12065550101.
        :param message: The message to send.
        :return: The ID of the message.
        """
        try:
            response = sns_resource.meta.client.publish(
                PhoneNumber=phone_number, Message=message)
            message_id = response['MessageId']
            logger.info("Published message to %s.", phone_number)
        except ClientError:
            logger.exception("Couldn't publish message to %s.", phone_number)
            raise
        else:
            return message_id



publish_text_message('+12025550113','text')