Where did these mysterious iphone messages come from?

Asked by hug_of_war (10735) August 27th, 2014 from iPhone

Last week my iphone was stolen. I now have my mom’s phone with a new number (different from my old one and hers). I also did a complete reinstall.

Well today I have two text message conversations from people I’ve never talked to in my life.

I just moved here and the texts are from a local number, while the area code on my phone is different.

How did this happen? It’s not one random text but whole conversations I never had.