SMS-messages will be sent to the numbers provided in international format (ie. +358 40 555 1234). Some limitations apply:
1) SMS Messaging in the USA is currently limited
Due to severe spam filters and legislation, we cannot guarantee the delivery of SMS messages in the United States. We are currently working on circumventing this issue.
2) SMS Messaging is disabled for organizations without credit card details entered
You must add SMS credit to your account before you can send a survey through an SMS channel. This can be done by clicking the "Top Up" button in the SMS settings tab of the survey editor.
SMS pricing varies by country and network. The current pricing can viewed here: SMS Pricing table