How do I know whether TTS or SMS will be used?

Answer:

For fixed [landline] numbers we will always use a TTS (Text-to-Speech) call.

For mobile numbers we might start with SMS then attempt a TTS if this is not successful. We can potentially make some modifications for the workflow in a few cases but this may affect your pricing for Verify, please get in touch with your Account Manager if you wish to discuss this further. However we would advise you to use our default Verify route, as we always have the goal of maximising the probability of conversion.

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