We deduct the balance for all SMS sent from the account. We will send every SMS that you submit to us, whether it is sent to an absent or an invalid number, or to the operator, who then, in turn, will try to deliver the SMS.
We are charged by the operator, which is why we, in turn, charge you so it's very important that you submit the numbers correctly and check if there are any country and operators restrictions that might block your messages. If you have an API connection, you can check the validity of your number database using our HLR service.