My phone was switched off since the past hour and I switched it on right now and I realised how normal it was for It to show me the exact present time and date and I wonder how.
In: Technology
There are a few different ways:
* Some devices like TVs are never completely “off” – even when you turn the TV “off”, there are some circuits that are still powered, such as a “realtime clock” chip.
* Some devices like computers will have their realtime clock chip powered by a watch battery, so even when you unplug the device it will still keep track of time.
* Some devices like your phone or your TV’s cable box will just connect to a network and ask a dedicated timekeeping service what time it is.
* GPS navigation devices get their time from the GPS satellites every time they connect.
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