You don't have to prove damages, just negligence. T-Mobile has a fiduciary duty to protect your private details. The problem is you'll be lumped into to some class action suit and handed a payout for pennies on the dollar while the lawyers laugh all the way to the bank. If individuals started suing it would be an absolute nightmare for T-Mobile. I'd happily pay the 40 dollars for a small claims court fee, but thankfully I'm not a customer of this bozo operation.