Grumpy Old Geeks Topics Mandatory arbitration Topic Mandatory arbitration 2 mentions in 1 episode The hosts discuss T-Mobile's terms requiring arbitration and its process for opting out. Mentions 360: Slackers Jul 13, 2019 21:17 you agreed to arbitration, which is buried deep in their terms of service 21:39 complete the opt-out form on the website or call a toll-free number