#999# says "Your T-Mobile Prepaid account balance is 0.00 USD. To add more minutes, dial *233 or redeem a refill card.
#646# says "Please dial #BAL# to check your remaining balance".
#225# (#BAL#) says "Current plan active until 06/23/2014 and will renew for $30.00. Account Balance is $0.00. Add money by dialing *233 or redeem a refill card.
What code will give me my used minutes?