Conserve your mobile data plan by setting guidelines on what items to download on your device and when:
- Tap the SideMenu icon at the left of your navigation bar to open the Side Menu.
- Tap the Gear icon at the bottom of the Side Menu to bring up Settings.
- Tap Mail.
- Under the Data Usage section, tap Auto-download attachments.
- Tap "When using Wi-Fi". Select your preference.
- Tap "When using Mobile Data". Select your preference.
- Tap "When Roaming". Select your preference.