I'd recommend that you start with the topics already listed below or the search feature on the site as this same topic has been discussed many, many times.
There is a _big_ difference between the Standard and Advance/Profession when it comes to a question about Wifi. Which are you getting and what do you mean by wifi and data use? Wifi applies more to the Standard as this is how your controller communicates with the Phantom. Data is really only used to load the map on the fly. This is really not possible with the Standard so you need to use the map feature and scroll around to cache the map before you connect to the Standard.