Iphone does not support shutdown alarm clock. At present, only Android phones on the market support turning off the alarm clock and turning it on. It's best not to turn off your cell phone when you sleep, in case something important happens.
In airplane mode, the Wi-Fi (WLAN) alarm clock that is turned on for fear of being pushed will keep ringing. When the mobile phone is in flight mode, it can't surf the Internet, make phone calls or receive information, which is not much different from turning it off. Doing so can not only ensure that the alarm clock will ring, but also reduce radiation and save electricity.
An alarm clock is a kind of clock with an alarm device. It can not only indicate the time, but also send out sound signals or other signals according to people's predetermined time. The movement structure of alarm clock mainly includes mechanical and timely electronic. Other types, such as transistor hairspring and tuning fork, are rarely used. They are called desktop alarm clocks that are usually placed on the table and travel alarm clocks that are mainly used for travel.
Apple and AT & amp； T secretly cooperated to create some software and hardware devices-Cingular wireless network at that time-AT&; T also gave Apple investment and great freedom, spending about $65.438+0.5 billion in 30 months. Some users may have set an alarm clock, but forgot to turn it on before going to bed, resulting in the alarm clock not ringing the next morning, which brought unnecessary trouble to their lives and work.