In this article: https://support.ringcentral.com/article/send-text-message-bulk-ringcentral-app.html, in the point number 4 say: "Enter a list of the names or phone numbers of the people you’d like to text in the To field (you can enter up to 100) "
How can I copy and paste a list of numbers, which separator should I use so that it recognizes me the phone numbers individually. Currently, if I copy and paste from a text file to the form, it recognizes the entire text string as a single number, as if it were not able to recognize where each number in the list begins and ends