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Apple iPhone 4s - Call audio routing; Phone noise cancelation

Apple iPhone 4s
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Large phone keypad
Make phone calls simply by tapping entries in your contacts and favorites lists. When you
need to dial a number, the large numeric keypad on iPhone makes it easy. See .
LED Flash for Alerts
If you can’t hear the sounds that announce incoming calls and other alerts, you can have
iPhone flash its LED (next to the camera lens on the back of iPhone). This works only when
iPhone is locked or asleep.
Note: This is a great feature for all users who, when in a loud environment, may miss the
tones associated with calls, texts, and other alerts.
Turn on LED Flash for Alerts. Go to Settings > General > Accessibility > LED Flash for
Alerts.
Call audio routing
You can have the audio of incoming or outgoing calls automatically routed through a headset
or speaker phone instead of iPhone.
Reroute audio for calls. Go to Settings > General > Accessibility > Call Audio Routing,
then choose how you want to hear and speak your calls.
You can also have audio from calls routed to your hearing aids; see .
Phone noise cancelation
iPhone uses ambient noise cancelation to reduce background noise.
Turn noise cancelation on or off. Go to Settings > General > Accessibility > Phone Noise
Cancelation.
Guided Access
Guided Access helps an iPhone user stay focused on a task. Guided Access dedicates
iPhone to a single app, and lets you control which app features are available. Use Guided
Make a call
Hearing aids

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