How do I check if my account was in the breach?

AdamSEA wrote:

T-mobile recently announced a data breach and right about that time all of my information attached to my account had significant amounts of intrusion. It took me over a week to move everything over to a new secure email address.

With my email they got access to a lot of my other accounts and with the combination of my credit card information and email they were able to intrude my credit card's account and attempted to redeem my rewards on a bunch of Victoria's Secret gift cards.

I'm very sure this is a result of their data breach, I haven't done much with my email and that credit card was relatively new. Is there some way to verify if my personal information was breached? 

It was. That's why T-mobile is giving away secure wi-fi and Like 2 dollar Macafee. There will be more to come. Just depends on what info they got. Change everything like yesterday, better safe than sorry.