1. From the home screen, tap Settings.
   Note: Updating Cellular Data settings does not affect Wi-Fi access or options.
   
2. Tap Cellular.
   
3. Cellular Data:
   
   Tap the "Cellular Data" toggle to turn the access to cellular data networks on or off.
   
4. Data Roaming:
   
   Tap "Data Roaming" toggle to turn Data Roaming on or off.
   Note: Leaving data roaming off will reduce unexpected usage and charges while roaming internationally. For more information on international roaming provisioning and rates.
   
5. To return to the Home screen, press the Home button.