does this affect only t-mobile users or literally everyone who has used experian in the past two years.
Only t-mobile users, the rest of their database was apparently not compromised. It's also quite nice of T-mobile to be giving out 2 years of credit monitoring and identity theft protection, not sure how much good it'll do but I suppose we'll see
Gonna add in one quick thing: If you know someone else who has t-mobile, like a parent or a friend or whatever you should probably let them know too.