I went from using 6GB data per month with my 3G 4s to 15GB with 4G LTE 6 Plus. I know the 4G uses more bandwidth but not double (or 2.5 times). How can I be using 15GB? I've even cut back on my usage since I noticed it doubling. Verizon and Apple have discussed it and finally Apple gave me a new phone. We shall see if it changes. Any other ideas?