139HearingMono audioWhen enabled, sound is delivered as mono, to supportlistening with one earphone.1. From the Home screen, touch Apps ➔Settings ➔ Accessibility.2. Touch Mono audio to enable or disable the service.Turn off all soundsWhen enabled, all sounds are disabled, including the voiceportion of calls.1. From the Home screen, touch Apps ➔Settings ➔ Accessibility.2. Touch Turn off all sounds to enable or disable theservice.MobilityTap and hold delaySet the length of time the phone considers a screen touchbefore interpreting a touch as touch-and-hold.1. From the Home screen, touch Apps ➔Settings ➔ Accessibility ➔ Tap and hold delay.2. Touch a setting to select it.Developer optionsSet options for use when developing apps for devices.USB debuggingWhen enabled, connecting your device to a computer with aUSB data cable launches debugging mode.1. From the Home screen, touch Apps ➔Settings ➔ Developer options.2. Touch USB debugging to enable or disable the setting.Development device IDView your device’s unique identifier (not configurable).1. From the Home screen, touch Apps ➔Settings ➔ Developer options.2. Under Development device ID, find your device’s ID.Allow mock locations1. From the Home screen, touch Apps ➔Settings ➔ Developer options.2. Touch Allow mock locations to enable or disable thesetting.