The first time you buy SMS credits for a room, the SMS credits will only be delivered after they have been paid for. We reccoment payment by credit card, as the payment is registered immediately. Usually, if a payment of the invoice happens in the morning of a workday, the payment will often be registered during the day. (Note for Norwegian customers: If you receive an electronic invoice in your accounting system, it will usually take a few minutes from the time you buy SMS credits before the EHF invoice is available in your accounting system, but it can also take a few hours.)