We use a Verizon hotspot and in 1 day it says we have already used 13 GB! We do not stream movies or music. We mainly check email and look at facebook. How can that use up all if my data? And according to the data usage info on my device its showing almost 4 GB being used between 12 Am and 3 Am. Its just me and my husband and we are both asleep at that time! How can it use 4 GB if no one is on?