General questions Billing questions and account management Installation and Configuration problems Troubleshooting		Billing questions and account management How much does your service cost? How do you calculate the cost of my call? I sometimes see ads with rates better than yours. Why? How do I pay for service? Can I block my account? How can I read my account statement? Where can I buy a voucher and can I do it online? How can I buy a “gift” voucher for my friend? How can I check my account balance?