If you have not added contacts to your account before:

1. Log in to your account
2. On the My Account page, click Contacts
3. Click on Create contact
4. Add the contact name, choose the country, and enter the phone number
5. Select the operator
6. Click Save Contact

To top-up a number saved to your contacts:

1. On the My Account page, click Contacts
2. Click Top-up next to your saved contact details
3. Select the top-up amount
4. Proceed to check out