How can I buy by.U call quota? How much it costs?

Just click "Buy Topping" on apps dashboard and choose the available offering:

To by.U Numbers

• 43.200 minutes - Rp 1.099 - 30 days

To All Operators

• 200 minutes - Rp 50.499 - 30 days
• 70 minutes - Rp 17.199 - 7 days
• 50 minutes - Rp 12.199 - 3 days
• 25 minutes - Rp 6.099 - 1 day