So, my daughter had a samsung and now has an iphone which uses data up like crazy (apparently this is an iphone thing). She has her data (1GB with our plan) off most of the time but cannot receive pictures via text unless she turns it back on - which is a pain turning off and on to control her data usage. If i add the Data Block to her plan, will she still be able to access apps and internet as long as she is connected to wifi? Just trying to figure out if this add on is a benefit or not to help her control her data usage. Thanks!