Frequently Asked Questions

  1. What does it mean to “opt out” of arbitration?

    Under T-Mobile’s Terms & Conditions of service, all legal claims must be resolved by binding arbitration or in small claims court, unless you chose otherwise. If you want to be able to sue T-Mobile in court (other than small claims court), or to participate in a class action in court, you must submit a valid request to opt out of the arbitration process. You can do this either by calling 1-866-323-4405 or by completing the opt out form on this website.

  2. How long do I have opt out?

    You may opt out of arbitration at any time within 30 days of the date when you activate a new line of service. If you miss the 30-day deadline, your opt out will not be effective.

  3. What is an arbitration?

    Arbitration is a process to resolve legal claims outside of court. Arbitrations are conducted by a neutral decision maker appointed by the American Arbitration Association. The procedures in arbitration are more informal and usually faster than lawsuits in court, and you can receive the same relief for your individual claims in arbitration that you could in court. But the procedures are different in arbitration and court. For example, in arbitration there is no jury, you cannot bring or join in a class action and there is limited opportunity for review or appeal of an arbitration decision.

    You may get more information about arbitration under the T-Mobile Terms and Conditions at and choosing the link for "Terms and Conditions" at the bottom of the page. For more information about the American Arbitration Association and about arbitration generally, you may go to

  4. Do I have to opt out for each mobile phone number or line of service that I have, even if they are on the same account?

    Yes, you must opt out for each phone number or line of service on your account.