It depends – if our system detects a problem with the number, it won’t send your message and you won’t be charged. For example, if there’s a validation error if you try to send to a country you are not authorized to send to, if there is a billing issue or if there’s an incorrect number prefix.
However, if the message leaves our system, you will pay to send it, even if it isn’t successfully delivered – for example, if the number has been delisted or ported.
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