Zte Axon User Manual page 74

1. Touch the Home key >
Settings > Call settings.
2. Touch Fixed Dialing Numbers and the following options are
available:
Enable FDN: Input the PIN2 code to enable the FDN

feature.
Change PIN2: Change the PIN2 code for FDN access.

FDN list: Manage the FDN list.

NOTE:
The PIN2 code is provided by your carrier. Entering an incorrect
PIN2 code more times than allowed can get your nano-SIM card
locked. Contact the service provider for assistance.
Set TTY Mode
Select a TTY mode for your phone to work with a teletypewriter,
or turn TTY off.
1. Touch the Home key >
Settings > Call settings > TTY mode.
2. Select one of the following options. Consult your
teletypewriter manufacturer's manual if necessary.
TTY Off: Users who can hear and talk can disable TTY

support.
TTY Full: Users who cannot talk or hear may use this

mode to send and receive text messages through a TTY
device.
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