Apple iPad iOS 8.1 - Manual (Page 158)

Appendix D Safety, Handling, & Support 158
Turn Cellular Data on or off. If Cellular Data is off, all data services will use only Wi-Fi—including
email, web browsing, push notifications, and other services. If Cellular Data is on, carrier charges
may be incurred. For example, using certain features and services that transfer data, such as
Messages, could result in charges to your data plan.
Monitor and manage your cellular data network usage. You can see which apps use cellular
data and turn off the option, if you want.
Turn LTE on or off. Turning on LTE loads data faster.
Turn Data Roaming on or off. Turning off Data Roaming avoids carrier charges when using a
network provided by a different carrier.
Set up Personal Hotspot. Personal Hotspot shares the Internet connection on iPad with your
computer and other iOS devices. See
Personal Hotspot on page 38.
Set whether cellular data is used for apps and services. Turn cellular data on or off for any app
that can use cellular data. If a setting is off, iPad uses only Wi-Fi for that service. The iTunes setting
includes both iTunes Match and automatic downloads from the iTunes Store and the App Store.
Activate, view, or change your cellular data account. Tap View Account, then follow the
onscreen instructions.
Lock the SIM card. Locking the SIM card with a PIN means you need to enter the PIN to use a
cellular connection on iPad.
Sound, music, and video
If iPad doesn’t have sound or if video doesn’t play, try these steps.
No sound
•
Make sure the iPad speaker isn’t covered.
•
Make sure the Side Switch isn’t set to silent. See Volume buttons and the Side Switch on
page 11.
•
If you’re using a headset, unplug it, then plug it in again. Make sure you push the plug all the
way in.
•
Make sure the volume isn’t turned all the way down.
•
Music on iPad might be paused. If you’re using a headset with a play button, try pressing the
play button to resume playback. Or from the Home screen, tap Music, then tap .
•
Check to see if a volume limit is set. In Settings, go to Music > Volume Limit.
•
If you’re using the line out port on the optional iPad Dock, make sure that you turn on the
external speakers or stereo, and that they’re plugged in correctly and working properly. Use
the volume controls on the the external speakers or stereo, not on iPad.
•
If you’re using an app that works with AirPlay, check to see if the AirPlay device you’re sending
the sound to is turned on and the volume is turned up. If you want to hear sound through the
speaker on iPad, tap and select it from the list.
A song, video, or other item won’t play
The song, video, audiobook, or podcast may be encoded in a format that iPad doesn’t
support. For information about the audio and video file formats iPad supports, go to
www.apple.com/ipad , choose your iPad, click Tech Specs, then scroll to Audio Playback,
TV and Video.