Raklet no longer sells SMS credits. To send SMS to your contacts, connect your own Twilio account to Raklet. Messages go out through Twilio, and Twilio bills you directly at its own rates.
How to set it up
Create a Twilio account at twilio.com, if you don't have one.
Copy your Account SID and Auth Token from the Twilio console.
In Raklet, go to SMS Settings and add them. Step-by-step guide
What does it cost?
Raklet doesn't charge for sending SMS. You pay Twilio per message, and the price depends on the destination country. See Twilio's SMS pricing page for current rates.
I bought credits before. What happens to them?
Any credit you have left is still used when you send SMS without Twilio connected. The Balance in SMS Settings shows what remains. Once it runs out, you'll need to connect Twilio to keep sending. Invoices for past purchases are still in your Billing section.
"Send Now" doesn't do anything
This usually means Twilio isn't connected and your remaining credit has run out. Connect Twilio using the steps above and try again.