If you have unlimited data for your cellular phone device then you do not have to worry about having your data being on or off. However, if you are someone like my family and I, we have a cap each month for data which is 10 GB shared among four people then it is important to keep track of data, so we do not go over. If we do go over which we never have (thankfully) it would be a hefty charge! But, once I almost went over but luckily I caught the reason!
I remind everyone on our family plan (which consist of: my parents, fiancé and I) if they are using wi-fi at home or free data anywhere like: at a friends/family members then to turn off cellular data! The reason being is once I was using wi fi data, when you are using wi-fi it automatically switches over from data to wi-fi, but the wi-fi was experiencing problems so really I was at home still but using the data plan. After watching YouTube for about thirty minutes, I noticed I was on LTE (data) instead of free home wi-fi because my house was experiencing internet was having some sort of problem! So now if I am switched off of data and at home – knowing the internet should work and if it does not then that means my home or the place I am using free wi-fi is having problems! That way you will never have any accidents and save money!
Plus it is very easy to enable and disable the data internet on our iPhones. You just go to setting > cellular > and toggle the on, off for the cellular data!
I am sure the phone companies love it when people go over on their data, text messages, or minutes. Luckily – we are not concerned about text messages and minutes because we have unlimited there.