What is data roaming on iphone?

Data roaming on an iPhone allows you to use your cellular data connection when you're traveling internationally and outside of your carrier's network coverage area. When data roaming is turned on, your iPhone can connect to a local network in another country and use data services, such as browsing the internet, sending emails, and using apps that require an internet connection.

It's important to note that using data roaming can be expensive, as your carrier may charge high fees for data usage outside of your home country. To avoid unexpected charges, it's recommended to turn off data roaming when traveling abroad and use a local SIM card or Wi-Fi to access the internet instead.

To enable or disable data roaming on your iPhone, go to Settings > Cellular > Cellular Data Options > Data Roaming and toggle the switch on or off. You can also monitor your data usage and set up usage alerts to avoid exceeding your data limit while roaming.