This is a misunderstanding.
Downloading from a 4G network is faster than 3G/2G network, but faster downloads do not necessarily mean faster use of data. How much data is used depends on the user and is not affected by the network or phone.
However, data is transmitted more quickly across 4G networks. If the phone is used in the wrong way then it will use data very quickly. We recommend turning off mobile data services when you do not require mobile network access.