Prefer Wi-Fi while roaming
What is that used for
Apple Watch Series 5, watchOS 8
User profile for user:
Ben_Z1
User level:
Community Specialist
Hi there rainbow112,
You can learn more about Data Roaming using this information from View or change cellular data settings on iPhone:
Turn Data Roaming on or off: Data Roaming permits internet access over a cellular data network when you’re in a region not covered by your carrier’s network. When you’re traveling, you can turn off Data Roaming to avoid roaming charges.
The 'Set cellular data use for apps and services' section of that article lets you determine what apps and services use cellular data or Wi-Fi as well.
Also, with Wi-Fi Assist you can stay connected to the Internet even if you have a poor Wi-Fi connection. This has more about this feature: About Wi-Fi Assist
If you are trying to get more details on something else, please provide more information.
Cheers!