The amount of 'sms credits' (we also call it units) required for one sms, depends on the destination network/country.
Please have a look at our coverage list to see the units required for an SMS to each destination country/network
If you want to buy bulk SMS credits with perfecmoney, or you want to buy bulk SMS credits with Bitcoin or USDT here, it's instant and automated. You can start sending bulk SMS immediately. (Bitcoin will need to reach 2-confirmations on blockchain)
You can also pay for bulk SMS with credit/debit card (though, that would require profile pre-approval through KYC process).
However, if you are paying for bulk SMS, using bank deposit or transfer; then submit your payment information and the transaction will be completed, immediately we could confirm your payment on our account