The correct Data Roaming setting depends on the eSIM you purchased.
| eSIM product | Data Roaming setting | | ----------------------------------------------------------------------------------- | ----------------------------------------------------------- | | Viettel, MobiFone, Japan KDDI, South Korea SKT Unlimited, or Australia Vodafone | Data Roaming is not required; leaving it on is harmless | | All other travel eSIMs | Follow the current product instructions |
Keep roaming off on your primary/home SIM if you want to avoid unintended roaming charges from your home carrier.
Data Roaming and APN are separate settings. Keep the APN on Automatic unless the exact current product instructions provide a different value.
Before changing either setting, confirm the exact product and destination from your order email or portal. If you are unsure, leave the APN on Automatic and contact support with the product name and device model. Do not delete the eSIM while troubleshooting.