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TTY does not work from mobile phone to mobile phone.
1Open the main menu and touch 7Settings > Calling >
Advanced Call Settings.
2Touch TTY Mode, then select a TTY setting.
voice privacy
You can encrypt outgoing voice calls and use secure channels when available.
1Open the main menu and touch 7Settings > Calling >
Advanced Call Settings.
2At Voice Privacy, slide the switch to On.
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