I'm on T-Mobile in Sacramento California and here is a statement of my services and fees associated with it (maybe it can help shed some light on the subject):

Monthly charges $69.98
Block S/MMS SUB $0.00
Get More 3000 $49.99
Total Internet Addon $19.99
Use charges $6.88
LOCAL AIRTIME, LONG DISTANCE and INTERNATIONAL CHARGES $6.88
One-time charges $0.00
Credits & adj. $0.00

Other charges $1.21
Regulatory Programs Fee* $1.21
Taxes and Fees $6.96
CA Advanced Services Fund $0.13
CA Relay Service and Communications Device Fund $0.11
California High Cost Fund - A (CHCF-A) $0.06
California High Cost Fund - B (CHCF-B) $0.13
California Teleconnect Fund $0.04
City Utility Users Tax $4.15
Emergency Telephone Users Surcharge Tax (911) $0.29
Universal Lifeline Telephone Service Surcharge $0.62
Total New Charges $85.03
Previous Balance $79.17
Whenever Minutes 3000
Data Usage Unlimited

Geesh, I couldn't get the formatting to fit correctly. My normal monthly bill is $79.17 after taxes for 3000 minutes and unlimited data.

The phone I use is the Sony TM506 but T-Mobile only knew that after I told them. Until then, they thought I had a five year old phone with this plan.