You can view the billed amount and breakdown after cancellation by logging into My au (Web).
Please see the steps below for details.
If you switch from au to UQ mobile/povo, or from UQ mobile to au/povo
For those who switched to other companies with MNP
If you have cancelled, transferred or inherited
Example: In case of cancellation on June 1, 2021
au ID before cancellation: 080XXXXXXXX
au ID after cancellation: 080XXXXXXXX_20210601