Samsung Galaxy S6 edge+ User Manual page 120

Setting
More settings
US dialing
International dialing
DTMF tones
Voicemail settings
For more information about Call settings, see
Phone App
Description
●
TTY mode: Enable service on your phone.
●
Hearing aids: Improve the sound quality of your phone when
using hearing aids.
Replace + with the international dialing code, except when entering +1.
Enter the international dialing code automatically (only when US dialing
is disabled).
Set the length of DTMF tones, which are used when pressing the
keypad while on a call.
Configure your voicemail.
Phone Settings.
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