To learn more about the AT&T network, visit www.att.com/offers/network. To view the locations AT&T voice and data service can be used, see the AT&T Network coverage map.
• CONNECTION TYPE: When connected to 4G LTE, the LTE icon will be displayed in the Notification bar.
• CONNECTION STRENGTH: The Signal Bars display the connection strength. The more bars that are displayed, the better the connection.
1. Swipe down from the Notification bar, then select the  Settings icon.
2. Select Connections, then select Data usage.
Select Mobile data, select the Mobile data switch.
Note: Mobile data is on by default. Turning off 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. You can also turn data on or off by device using your own myAT&T account.
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From the Data usage screen, select International Data Roaming then select the International 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 website.