Survey Texting campaign can consist of multiple questions with either multiple choice or open-ended response with a welcome message and a completion confirmation message.
Based on the length of your questions plus multiple choices, it may need two credits for one question delivered.
Every time our system sends out a text message of 160 characters or 70 characters in case of a text message contains Non-GSM characters (Unicode), from your campaign, it considers a one text credit.
If you have a survey with three multiple-choice questions and 500 recipients, you may need at least 4000 text credits plan.
You must plan ahead of your event and also if this is an ongoing campaign, speak to the sales team for a long-term discounted plan
Read More about Non-GSM characters (Unicode) Characterset at the following links: