I've been having a lot of trouble with my less than one month old T-Mobile account. I'm kind of angry at them, so I thought I'd post all the executive customer relations numbers (customer service but better) I've been able to find. I've already been talking with Mark and he's been somewhat helpful, but I think I'm going to have to try some new numbers. I'll update this post later after I've found more names. As far as I can tell every extension in the 341-8000's is valid, but I'm still working on finding more. Hope this helps you if you are having trouble with your T-Mobile account!

T-Mobile Executive Branch Numbers
(don't blame me if I mess up when spelling their names)

To reach any of these numbers, first dial 1-877-290-6323
341-8000 to 341-8009 are not valid numbers.

341-8010 - Salaman Toya - ECRC
341-8011 - Jennifer - ECRC
341-8012 - Anthony - ECRC
341-8013 - Angela Becket - ECRC
341-8014 - Barbara - ECRC
341-8015 - Mark J. McCrain - ECRC
341-8016 - Elisabeth - ECRC
341-8025 - J. Vandelay - ECRC
341-8082 - Kelly Spindle - ECRC
341-8083 - Jennifer Bachus - ECRC

Key:
ECRC = Executive Customer Relations Coordinator

EDIT (12/8/2011): Zuyq Def has some excellent information down in the comments, check that out if you want more numbers and information.