I will be traveling to Ireland and Scotland soon. I've added the Travel Pass international plan, set to start the day we arrive. Because I have a hospitalized family member, I need to be able to receive phone calls at all times -- so I will not be able turn off roaming on my Iphone 7. My normal data usage is far below the amount provided by my plan, so I shouldn't have to worry. But I keep reading that some folks with iPhones say their reported data use seems much higher when they travel internationally than it would have been with the same use domestically. I probably won't need to use data that often ... is there a setting I can use to be able to always be able to receive phone calls but not run up crazy data use?