View signal strength, network connection status, and enable/disable mobile network and international roaming.
INSTRUCTIONS & INFO
From the home screen, swipe down from the Notification bar with two fingers.
Tap the Settings icon.
To toggle mobile data on/off, tap Data usage.
Tap the Cellular data switch. Note: Mobile data is on by default. Turning off the mobile data will not allow any data to be transferred over the wireless network. Wi-Fi access, voice function, and standard text messaging are still allowed.
If disabling, tap OK.
To toggle data roaming on/off, from the Settings menu, tap More.
Tap Cellular networks.
Tap the Data roaming switch. Note: Data roaming is off by default. Enabling Data roaming will allow the device to attach to foreign wireless network signals when available. International roaming charges will apply. This setting does not apply to voice access which requires additional provisioning for usage on international networks. To learn more, visit the AT&T International Calling website.