some guy came up to me at a retail store and asked if i would call his phone to see if it worked.  i obliged and it didn't ring on his end so he thanked me and walked away...immediately afterwards i noticed that he wasn't even shopping in the store...more just looking creepy so i started to regret calling someone i didn't know.  
the next day this phone number started texting me with some really weird questions that i knew nothing about.  I'm worried this is some sort of scam although i can't imagine what they could be trying to gain...