Dell Lightning User Manual page 74

Disability settings
ease of access
To check for operating software version and storage spaces
1 Touch the Start button
2 Under system, touch about.
To reset your phone to the default state
CAUTION:
state and erase all data and downloaded applications stored on it.
Ensure that you back up all the required data before you reset the
phone.
1 Touch Start
2 Under system, touch about.
3 Touch the reset your phone button.
74
Customizing Your Dell™ Lightning
Teletypewriter (TTY/TTD) mode: Enable this mode
to let the user with speech or hearing disabilities
conduct phone conversations by typing.
Hearing Aid Compatible (HAC) mode: Enable this
mode to minimize interference from the phone with
the user's hearing aid, and optimize audio output for
the hearing aid.
NOTE:
Enabling the HAC mode will disable the
Bluetooth and Wi-Fi transmitter functions.
→ Menu button
The following steps will restore your phone to the default
→ Menu →
Settings.
→
Settings.