If Voice Roaming is turned off, your iPhone may have trouble connecting to your carrier's cellular network.
How Do I Turn On Voice Roaming?
- Open the Settings app.
- Tap Cellular.
- Tap Cellular Data Options.
- Tap Roaming.
- Turn on the switch next to Voice Roaming. You'll know it's on when the switch is green.
- Check out this article to learn more about cellular data and dating roaming.