iphone data roaming refers to the "data roaming" function under the iPhone's cellular network, and data roaming is roaming across operators; in China, this function has no effect whether it is turned on or off. Because it only works for different mobile operators internationally.
#The operating environment of this tutorial: iOS 16 system, iPhone 14 mobile phone.
What does iPhone data roaming mean?
Data roaming refers to roaming across operators.
So-called international roaming, if you do not turn on the data roaming switch, the phone detects that the network you are using is different from the default network of your mobile phone card. He will turn off the Internet function because he is afraid that you will incur high phone bills while surfing the Internet while roaming internationally. If you turn on data roaming, it doesn't matter which operator's signal you borrow abroad. He will still surf the Internet and update the background and so on. For mainland operators, if you have not activated international roaming service, it does not matter whether data roaming is turned on or off. It will not have any impact. If you have activated international roaming service.
It is best to turn off data roaming when you are in border areas or abroad. The data charges for international roaming are exorbitantly high, and can cost thousands of dollars an hour. The data roaming function of our Chinese version of IPHONE is mainly used by those who have opened international roaming services and those who use IDD cross-domain cards in Hong Kong and Macau. It is generally not used.
Extended information
The role of "data roaming" under iPhone cellular network:
1. When used domestically, whether it is turned on and turning it off have no effect as it only works for different international mobile operators.
2. Domestic mobile operators have cooperative relationships with other international operators. For example, when you go to the UK, you can also use your domestic phone number to make calls.
3. In foreign countries, if the "data roaming" option is turned on, once you use the iPhone's mobile network to access the Internet, data roaming charges will be incurred. Of course, the charges are expensive. When going abroad, you need to turn off these options to avoid incurring high network fees.
4. Data roaming refers to the roaming that compliments the operator. It doesn’t matter whether it is enabled or not in China. Because your operator is fixed in China, this function is for international roaming.
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