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- Let's talk about wireless connections.

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Most technologies regarding
mobile device communications

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and mobile device control are wireless.

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If they are designed
and configured properly,

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the wireless connections
can offer ease of use

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and great speed.

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We'll be discussing wifi, cellular, GPS,

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We'll be discussing wifi, cellular, GPS,

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and similar data related
wireless technologies

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in other videos.

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But for this video, let's
focus on wireless connections

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used by mobile devices to
communicate with accessories

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and also other mobile devices.

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One of the most common is Bluetooth.

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This is a technology that allows users

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to incorporate wearable technology

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such as headsets and earbuds
and smart watches and so on.

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And they incorporate these

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with their existing mobile device.

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But the technology can go further.

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For example, allowing for
the streaming of music

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to external speakers

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or to an automobile's music system.

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However, it's usually limited to 33 feet,

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that's 10 meters

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and that's normal for smartphones.

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and that's normal for smartphones.

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They use class 2 Bluetooth
devices limited to 33 feet.

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And you can see here, we have a screenshot

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of the notification area,

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of the notification area,

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the swipe down notification
area of a smartphone,

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and we see that Bluetooth is running.

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And in another video, we'll show

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how to connect to a headset,

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also to an external speaker,

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and to an automobile.

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Next on the list is
Near-field communication, NFC.

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This allows smartphones to
communicate with each other

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via radio frequency

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by touching the devices together

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or in some cases, just having
them in close proximity.

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NFC uses the radio
frequency 13.56 megahertz

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and it can transmit between 100
and 400 kilobits per second.

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and it can transmit between 100
and 400 kilobits per second.

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Notice that lowercase B, that's bits.

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So that doesn't sound like much.

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And it does transfer
slower than say, Bluetooth

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but it's usually plenty
for sending and receiving

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contact information, an
MP3s, and even photos.

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Now, an NFC device can
also act as a smart card,

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performing payment transactions,

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and it can also read NFC tags.

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If you're not sure whether
your device supports NFC,

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check the settings in the
mobile operating system.

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And you can see here, it is supported.

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And you can see here, it is supported.

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It's not on right now,
but it is supported.

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And most smartphones do
incorporate NFC technology.

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On older devices, you can open up the case

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and look near the battery to
see if it's NFC compliance.

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Another wireless technology

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used by some smartphones and
tablets is infrared or IR.

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used by some smartphones and
tablets is infrared or IR.

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Though it's not included on
many flagship smartphones

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as of 2017,

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as of 2017,

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some mobile devices come
with a built in IR blaster

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that can take control of
televisions and some other devices

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if the smartphone has
the proper app installed.

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infrared works on a different
and higher frequency

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than wifi and Bluetooth and so on.

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So it does not interfere
with those technologies

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when it's used.

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But because so many appliances
and electronics today

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are smart enabled,

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the IR blaster becomes less
important on today's phones.

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And in fact, on this
particular phone here,

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it does not have an IR blaster at all.

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And this is a 2017 model.

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And finally, another commonly
used wireless technology

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is the mobile hotspot.

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When enabled on a properly
equipped smartphone or tablet

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with a 4G connection or faster,

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it allows a user to connect other systems,

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desktops, laptops and other mobile devices

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in a wireless fashion

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through the mobile hotspot
created on this smartphone.

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through the mobile hotspot
created on this smartphone.

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Ultimately allowing those other computers

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access to the internet.

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So this can be a great
way to connect your laptop

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or other computer if wifi goes down.

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But remember, there's usually a catch.

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Many providers charge for data usage,

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unless you have a corporate plan.

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So, this is used

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So, this is used

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quite often as a secondary
type of connection or a backup.

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In addition, the further away
you are from a cell tower,

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the lower the data transfer rate

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or even the chance of connectivity at all.

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So, know the pros and
cons of running a hotspot

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on your mobile device before you do so.

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And you can see here in this image here,

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we have the mobile hotspot turned on

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on this V30 phone.

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It does have that capability.

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And so, other devices can
connect through this phone

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to go out to the internet.

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And we show exactly how to do that

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in another video as well.

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And by the way, this is
different than USB tethering.

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It does the same thing.

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It's just that USB tethering
does this with a cable,

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with an actual USB cabled
connection to a system.

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So, know the difference between those.

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USB tethering does it with
an actual cabled connection,

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it can only really work with one system

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that you physically connect.

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But the mobile hotspot,
all is done wirelessly.

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It's like, your smartphone becomes

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a wireless access point almost.

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And multiple systems can
connect to the smartphone

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when you do it that way.

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Know the difference between USB tethering

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and a mobile hotspot.

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And understand the various
wireless connections,

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Bluetooth, NFC, IR, and
those mobile hotspots.

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Bluetooth, NFC, IR, and
those mobile hotspots.

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And that's it for this video.