Your smartphone can use an optional teletypewriter (TTY) device, for people who are hard of hearing or have a speech impairment.
1 Plug the TTY device into the smartphone’s headset jack.
2 Touch Menu > Settings > Call settings > TTY mode, and choose a TTY setting.Emergency calls
Note: Your service provider programs one or more emergency phone numbers that you can call under any circumstances, even when your phone is locked. Emergency numbers vary by country. Your pre-programmed emergency number(s) may not work in all locations, and sometimes an emergency call cannot be placed due to network, environmental, or interference issues.
1 Touch Phone (if your smartphone is locked, touch Emergency Call).
2 Enter the emergency number.
3 Touch to call the emergency number.
Note: Your phone can use location based services (GPS and AGPS) to help emergency services find you. See “ Location Services ” on page 60.
Cool down
In very limited circumstances, such as where your phone has been exposed to extreme heat, you may see “Cool Down” messages. To avoid possible damage to your battery and phone, you should follow these instructions until the phone is within its recommended temperature range. When your phone is in “Cool Down” mode, only emergency calls can be made.
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