Call came in at 1:36 am.  Caller kept asking me who I was, I asked who he was calling for and he would say "YOU'  He would not identify himself or the purpose of the call.  

I called this number back and got a message that this call was generated using an app called BOBSLED with T Mobile.  I was able to block my number from receiving future calls from this app.  Stupid time to try out an app.