But you might be travelling to a more distant place this holiday and want to minimize the consumption of that data .
Data roaming charges are still active in Asia, in countries outside the European Union (Switzerland, for example) or in the United States. And you can always activate that data to check some urgent things, but it is not superfluous to take some measures in the iPhone configuration to not have scares in the bill when we come back from the trip.
The first thing, obviously, is having the data roaming option turned off. This guarantees that you won’t consume data in the foreign country, forcing you to look for a Wi-Fi network wherever you go. You can find this option under Settings> Mobile Data> Data Roaming.
But as we have said before, we may want to make some quick enquiries that we need in the middle of the journey. We can reactivate that roaming, but then watch out for all the applications that are going to want to transmit and receive data . We must limit them so that consumption is as small as possible.
To do this we can return to the main Mobile Data section within Settings, where we will find the “Use Mobile Data for” section. There we can disable mobile data access for each application we have installed individually. If we go on a trip, the recommended thing to do is to block everything except those applications that we want to use: Safari, the mail client, some social network… nothing else.
Also, go to one of the last items on this list, called System Services , where you can see which parts of iOS have used the most data. Here you can no longer block anything, but it will help you to be able to identify what you consume the most 4G with and cut off that use during the trip.
One thing that can guide you is that under the name of each application is the amount of mobile data it has consumed. Be careful with Twitter: it can easily consume more than 1 GB of data if we give it too much freedom.
Under that list of applications we also have the option to disconnect from Wi-Fi networks whenever they are weak, something that we should disconnect when we go on a trip so that we don’t suddenly jump to a 4G connection without noticing it.
One last tip: in the data roaming section you can choose to use only the 3G band and not the 4G band . You will be a bit slower, but if by any chance your mobile starts spending mobile data without you wanting it to, it will do so more slowly and in the end the scare won’t be as big. Besides, not using 4G improves the iPhone’s battery. Something that in a trip, is valued much more.