Samsung SGH-I747MBAATT - Manual (Page 108)

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Your phone and TTY device will connect via a special cable
that plugs into your phone’s headset jack. If this cable was
not provided with your TTY device, contact your TTY device
manufacturer to purchase the connector cable.
1. From the Call settings screen, tap TTY mode.
2. Tap TTY Full, TTY HCO, or TTY VCO to enable TTY mode.
3. Tap TTY Off to disable TTY mode.
Hearing aids
This option allows you to turn on Hearing aid compatibility on
your device.
Ⅲ From the Call settings screen, tap Hearing aids to
enable the Hearing aid compatibility feature.
Blocking mode
When enabled, notifications for selected features are
disabled. You only receive notifications of incoming calls
from people on the allowed list.
1. From the My device menu, tap Blocking mode.
2. Tap the ON/OFF slider, located to the right of Block
mode, to turn Blocking mode ON .
3. Tap Blocking mode then tap next to each feature to
enable. Selections are: Block incoming calls, Turn off
notifications, Turn off alarm and timer, and Turn off LED
indicator.
4. Tap one of the following to enable or disable the
feature. Choose from Disable incoming calls, Disable
notifications, Disable alarm and timer, or Disable LED
indicator.
5. Tap the Always field to disable it and configure the
From and To time fields.
6. Tap Allowed contacts to assign contacts that are
exempted from these rules. Choose from None, All
contacts, Favorites, or Custom.
7. Tap Allowed contact list to view your allowed contacts.