You can register for one here -> https://account.africastalking.com/auth/register

The information needed for registration is:

Once you register your account you will receive 2 emails, a welcome email, and an account verification email. It's important you verify your account before proceeding. An unverified account has limited functionality.
You should now be on the "Home Page", the primary actions here are your Sandbox and Teams. The page looks as follows:

For any further information please send us an email on info@africastalking.com or support@africastalking.com