Việc xác định múi giờ (Time Zone) sẻ giúp cho iPhone biết được chính xác khu vực bạn đang sử dụng điện thoại để điều chỉnh giờ giấc và các cấu hình cho các ứng dụng Internet. Nếu bạn không muốn iPhone tự động xác nhận múi giờ bạn có thể tự điều chỉnh cho thích hợp | By default if you don t touch the screen for a minute iPhone locks automatically. . Sleep Wake button Lock iPhone Press the Sleep Wake button. Unlock iPhone Press the Home o button or the Sleep Wake button then drag the slider. Turn iPhone completely off Press and hold the Sleep Wake button for a few seconds until the red slider appears then drag the slider. When iPhone is off incoming calls go straight to voicemail. Turn iPhone on Press and hold the Sleep Wake button until the Apple logo appears. For information about changing how long before iPhone locks see Auto-Lock on page 145. For information about setting iPhone to require a passcode to unlock it see Passcode Lock on page 145. Volume Buttons When you re on the phone or listening to songs movies or other media the buttons on the side of iPhone adjust the audio volume. Otherwise the buttons control the volume for the ringer alerts and other sound effects. WARNING For important information about avoiding hearing loss see the Important Product Information Guide at support manuals iphone. To adjust the volume use the buttons on the side of iPhone. To set a volume limit for music and videos on iPhone see Music on page 158. Chapter 2 Basics 27 Ring Silent Switch Flip the Ring Silent switch to change between ring A and silent A modes. Ring Silent- tK When set to ring mode iPhone plays all sounds. When set to silent mode iPhone doesn t ring or play alerts and other sound effects. Important Clock alarms audio-dependent applications such as iPod and many games still play sounds through the built-in speaker when iPhone is set to silent mode. By default when you get a call iPhone vibrates whether it s set to ring mode or in silent mode. If iPhone is set to ring mode you can silence a call by pressing the Sleep Wake button or one of the volume buttons once. Press a second time to send the call to voicemail. For information about changing sound and vibrate settings see Sounds and the Ring Silent Switch on .
