With the included transfer of mobile data to the iPhone, there is a risk of paying extra money, because some applications go online on their own schedule, and are also updated from time to time. If you are faced with such a problem, then 3G Internet can be turned off.
Mobile data (aka cellular data) is the mobile internet on your iPhone. If you turn them off, you will no longer be able to browse the Internet and use applications that require an Internet connection to work. Applications such as e-mail or calendars, even when the Internet is disconnected, can provide some functionality, but mobile data is necessary for their full operation.
It is worth noting that turning off cellular data on an iPhone does not mean that you will no longer be able to access the Internet from your device. After all, there is still Wi-Fi, and mobile data can always be turned back on.
3G is the speed of your mobile internet. If you have such an opportunity on your iPhone, then just turn off 3G to return to 2G. Turning off 3G in this case helps to extend the battery life, while you can continue to use GRPS and EDGE (slower internet standards).
Data roaming is the use of mobile internet abroad. Sometimes operators charge a lot of money for using the mobile Internet, so when abroad, it makes sense to disable data roaming on your iPhone.
Now let's look at how to turn off the Internet on an iPhone - be it mobile data, 3G or data roaming. Let's take iOS 6 as an example, in other versions the settings are slightly different, but not so much that it was impossible to navigate.
First, go to the settings of your phone, select the "General / General" section, then - "Network / Network". Use the slider to turn off 3G or cellular data. Data roaming is also disabled in this menu. If you want to return the Internet to your iPhone, then simply do the opposite by scrolling the slider until the necessary functions are enabled.
You can also scroll down this menu below, there you will see a set of settings to restrict the transmission of cellular data by various applications. Certain applications issue warning messages that their use via the mobile Internet can cost you dearly, but before launching, not all applications notify about this!
