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  • I think youll agree with me that smartphones are sneaky beasts. They live a secretive life

  • full of things you might not knowFor example, they have a radio built into them thatgasp!

  • can’t be turned on! Hey, I’ve got a smartphone that likes to play hide and seek

  • with me. I never find it where I put it down -- or where I thought I put it down. Anyway,

  • let’s take a sneak peek at what is known about this mysterious creature

  • 1. Why smartphones are so big? Ever since they appeared in 2007, no-keyboard

  • smartphones have been growing steadily bigger. Currently, the largest smartphone doesn’t

  • even fit into your palm properly, spanning 7.3 inchesthat, and it’s also folding,

  • bringing back memories of old flip phones. These giants of mobile world are called phablets

  • — a mix of phones and tablets. The reason for this growth is that smartphones are becoming

  • our primary computing devices, pushing aside PCs and laptops. The mobile Internet connection

  • is getting faster, picture quality is getting better, so now we can do all the stuff we

  • need on our phones. And that calls for bigger screens that would allow to work with text

  • more easily, edit images and videos, and much more.

  • 2. Can you get a shock using a charging smartphone? While charging, your phone is connected to

  • the grid, so naturally you’d be concerned about a chance of getting electrocuted. Don’t

  • fret, though: unless youre using a counterfeit charging device, youre 100% safe. The charger

  • transforms the AC, or alternate current, in the grid to direct current, or DC, which is

  • much weaker and can’t cause any serious damage. But if there’s some problem with

  • the charger’s insulation, the AC might get into the DC part of the circuit, so when you

  • touch it, you might receive a hefty shock. So it’s best to only use original chargers.

  • 3. Why does the quality of sound differ so much in headphones and in the smartphone’s

  • speaker? It’s all the matter of size and distance.

  • Sound is made by air molecules bumping into each other and going in waves from the source

  • to your ears. The bigger the source, the stronger it affects the air, and so the louder and

  • clearer the sound. That’s why the tiny speaker in your phone will never rival those huge

  • boxes they use at concerts, or even the speaker in your TV or laptop.

  • Headphones, on the other hand, are small but still manage to provide amazing sound. That’s

  • because they produce it right into your ears, without the need to cover long distance between

  • your eardrums and the membrane. And that’s why, when someone listens to music in their

  • headphones with poor isolation, you can only hear that annoying scraping.

  • 4. What is planned obsolescence? It’s no secret that electronic devices are

  • manufactured with an expiry date in mind. But it’s not evil corporations deliberately

  • making them last a very short time so that you buy new ones every year. Every part of

  • a gadget has its own service time, and it makes sense to take the part with the shortest

  • life expectancy as a standard. In a smartphone, that’s normally the battery. It has a limited

  • number of recharge cycles, after which it stops working. As more and more phones are

  • made with non-removable battery, you can’t simply replace it, so manufacturers make all

  • other parts of the phone match the battery’s lifetime. Speaking of which

  • 5. Why are there non-removable batteries at all?

  • Technically, there still are, but theyre swiftly becoming history. First of all, the

  • conventional rectangular battery made the phone bulky and, let’s face it, quite unappealing.

  • The larger the battery, the more juice it has, so this design was necessary for the

  • phone to work long hours. Secondly, the back lid had to be made of plastic for easier removal,

  • and it didn’t fit the new trend for metal and glass. Some manufacturers solved the problem,

  • but that wasn’t all yet. Yet another issue was that an extra layer

  • of protection for the removable battery required additional space, and that’s a luxury, given

  • the miniature size of a phone. With a built-in battery, this space could be used for cool

  • additional features, like wireless charging, for example. And finally, the rectangle shape

  • was only needed for easy removal. Modern batteries can use any shape instead, and sometimes they

  • look quite weird. Step design or L-shape are just a few examples of that.

  • 6. How can a smartphone not overheat without a cooling device?

  • PCs and laptops all have extra coolers to keep them, well, cool. Smartphones, on the

  • other hand, can operate without any additional fans. Their insides are built so that they

  • can withstand a certain range of temperatures. If your phone doesn’t get into the environment

  • that’s either too cold or too hot, it should be okay even if you use it to its full potential.

  • The phone casing is also a kind of a natural coolant that absorbs heat from the inside

  • and lets it go to the outside. And finally, the smartphone parts that generate heat do

  • it in much less copious amounts than a laptop would. Normally, it just wouldn’t be enough

  • to overheat a phone. But you still can, if you try hard enough! I’d strongly recommend

  • not doing that, though. 7. How can a compass work inside a phone if

  • there’s a magnet in it too? As you probably know, the speaker needs a

  • magnet to work, and that should throw the compass off balance. But it doesn’t happen

  • because the phone’s compass is adjusted to ignore everything that’s built inside

  • the phone. Manufacturers warn, though, that any external magnetic force can still make

  • it go crazy, so if you bring another magnet close to the phone, its compass will show

  • a wrong direction. The same can happen if you walk through the security metal detector

  • or put your phone close to an MRI machine (which is also ill-advised).

  • 8. Why don’t smartphones have built-in FM radio?

  • Actually, they do. Every smartphone there is on the market has a built-in radio chip

  • that can tune in to AM and FM radio, but the catch is that it’s locked and can’t be

  • unlocked without the service provider’s and manufacturer’s say-so. There’s much

  • debate about this, and in earlier smartphones the chip was unlocked by default, so you could

  • listen to radio (and still can, if you buy such a phone) as much as you wanted. Today,

  • providers argue that consumers don’t need or want the radio on their phonesthey

  • prefer to stream podcasts and newsfeeds from the Internet instead. Well, what do you do

  • to listen to music and news? Radio or the web? Let me know down in the comments!

  • 9. How do smartphones know how much charge they have left?

  • A smartphone battery has a certain voltage range that is tested at the production stage.

  • During these tests, engineers detect the voltage at the battery’s maximum capacity and check

  • it all the way down to zero. Then they convert these numbers into percentage and program

  • the phone to show it on its screen. This way, the phone will know that, for example, 4.3

  • Volts correspond to 100%, while 2.7 Volts are 1%. By the way, the older the battery,

  • the sharper its charge drops to zero. If youve ever seen your phone turning off while still

  • at 4%, now you know why. 10. How come smartphones acquire a GPS signal

  • much faster than dedicated GPS equipment? If you have a car with a GPS navigator, you

  • probably know how long it takes to connect to the satellites and give you your location.

  • If you turn on GPS on your smartphone, though, itll only take a few seconds to adjust

  • and show you where you are. It happens because a smartphone can use different networks to

  • help it locate itself, such as cellular or wireless networks. Dedicated GPS equipment,

  • on the other hand, can only rely on satellites. So if, for some reason, all the cellular and

  • Wi-Fi networks suddenly shut down, your phone will take as much time to connect to GPS as

  • your car. And a little bonus: Why do browser pages sometimes

  • load in a weird way, only to correct themselves in a few moments?

  • Weve all seen it: you load a page on your smartphone or PC, it first appears very strange

  • and basic, like it would look, perhaps, in the 1990s, and then it kinda reloads and finally

  • appears as it should. It’s called a flash of unstyled content, or FOUC. This happens

  • especially when you visit the website for the first time, so it doesn’t yet have cookies

  • to help you load it faster. The flash is the content of the website seen in your browser’s

  • default styles. It appears because the browser hasn’t managed to load the stylesheet of

  • the website in time, but it still hurries to deliver. Let’s thank it for that, I guess.

  • Hey, if you learned something new today, then give the video a like and share it with a

  • friend! And here are some other videos I think you'll enjoy. Just click to the left or right,

  • and stay on the Bright Side of life!

I think youll agree with me that smartphones are sneaky beasts. They live a secretive life

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為什麼手機沒有調頻收音機和10個罕見的事實。 (Why Phones Don't Have FM Radio and 10 Rare Facts)

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    林宜悉 發佈於 2021 年 01 月 14 日
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