Settings 1481. Press and tap > Settings > My Device.2. Tap Call, and then tap the check box Increase volume in pocket to enable or thesetting.Us DialingWhen enabled, the US dialing option replaces “+” with the international access code f or yourlocation.1. Press and tap > Settings > My Device.2. Tap Call, and then tap the check box next to US dialing to enable or disable the setting.International DialingWhen US dialing is enabled, it uses the International dialing code to replace “+”. US dialingmust be disabled to access the International dialing code.1. Press and tap > Settings > My Device.2. Tap Call, and then tap the check box next to US dialing to disable the setting. USdialing must be disabled to access the International dialing setting.3. Tap International dialing, and then use the keypad to enter the international dialingcode.4. Tap OK to save the code.TTY ModeA TTY (teletypewriter, also known as a TDD or Text Telephone) is a telecommunications phonethat allows people who are deaf, hard of hearing, or who have speech or language disabilities,to communicate by telephone.Your phone is compatible with select TTY phones. Please check with the manufacturer of yourTTY phone to ensure that it supports digital wireless transmission. Your phone and TTY phonewill connect using a special cable that plugs into your phone’s headset jack. If this cable was notprovided with your TTY phone, contact your TTY phone manufacturer to purchase theconnector cable.1. Press and tap > Settings > My Device.2. Tap Call, and then tap TTY mode to choose a mode, from TTY Off, TTY Full, TTYHCO, or TTY VCO.DTMF TonesSet the length of Dual-tone Multi-frequency (DTMF) tones, which play when you use the keypadduring a call, such as when navigating menus.