IPhone 5s or Verizon Wireless uses my Cellular Data quickly?

I have no clue how I went over my 4gb cellular data. I had a iPhone 4s before with iOS6 and I never went even 3gbs for 2 years. Is their any way I can fix my data?!

You need to check all the apps you have, 1 or 2 might be using all your data, see what apps you now have that you didn't on your previous iPhone. Mkae sure not GPS or such is on, all the time.

In settings > cellular
you can turn off cellular data for each app u own on the device
And also when watching video or steaming music using data in HD drains the GBs so turning the HD off my help.