Samsung t139 - Manual (Page 65)

Changing Your Settings 61
Self-help
A customer care (diagnostic) solution is provided on this handset.
This solution allows your carrier to efficiently solve subscriber
service issues from a T-Mobile portal.
To use this feature:
1. From the Idle menu, dial 611 then press from the
handset to diagnose.
Self-Help software immediately captures the call and
displays a menu screen that displays frequently asked
questions, troubleshooting and other tips and tricks.
2. Using this portal, you can automatically configure your
handset, using step-by-step instructions. You can also
make account inquiries and pay bills.
Note: For more information, please contact T-Mobile customer service.