Hi vikramvi,
the consumption indicator for minutes with a prepaid tariff isn't implemented yet. It's only implemented for postpaid tariffs.
You can view a usage data overview in your customer account though. Log in here: click
Go to "Meine Produkte" -> "bearbeiten" behind your mobile number. There you find a point called " Nutzungsdaten einsehen".
After you accepted the data storage you have the possibility to check ur calls there in the future. The usage data will be stored for 80 days.
Please take into account, that the usage data overview is only implemented in the desktop version of the customer center.
Greetings,
Bea