Ok so I sometimes tether with my phone at work since our network here blocks certain websites (Facebook, etc). Someone at the office has a "MiFi" thing from either Sprint or Verizon. It is unsecured and my phone connects to it. If I am tethering and my phone is connected to the "MiFi" wireless network does it use that as the data and not my data plan? I am thinking yes but I wanted to just see if anyone else knows this answer.