Smartphones are devices designed for communication and connectivity. This means that their primary function is communication. Smartphones come with a range of tools that help them carry out this function.

Communication and connectivity entails being able to access mobile broadband as well as the internet, and connect to other electronic devices like other smartphones, Bluetooth headsets, smartwatches, smart TVs etc.

The main connections used by phones include Bluetooth, Wi-Fi, Internet/mobile broadband, USB and infrared technology.

As you may have noticed, all of the following except one are wireless. The shift from using wired communications to wireless started as far back as the 1980s. Modern smartphones today are almost all wireless except for their charging ports (the high end phones have wireless charging). These were all made possible by the addition of radios and modems to the smartphone. Sometimes these radios are embedded into the SoC, other times they are attached to the motherboard outside of the SoC.

BLUETOOTH
Bluetooth is a wireless standard used for exchanging data between fixed (e.g Personal Computers) and/or mobile devices (e.g. smartphones) over short distances. It was introduced in 1989. Bluetooth was first used in phones in 2001 appearing in the Ericsson T36.
It quickly became popular and replaced the older and slower Infrared means of inter-device communication.

Uses
1. File sharing: Its major use was for file transfer e.g. documents, multimedia etc. but it is only used for transfer of small files these days as file sizes have gotten bigger and it is impracticable to send them via Bluetooth.
2. Interconnectivity between devices: this is now the primary use of Bluetooth technology especially in this age of IoT (Internet of things). Inter device connection includes headset to smartphone, smartphone to smartwatch, printer to PC, smartphone to PC or printer, video game consoles to controllers (game pads) etc.

BLUETOOTH SPECIFICATIONS
The first generation Bluetooth radios, Bluetooth version 1.0 was released in 1999. It had a speed of 1 Mbps (mega bit per second) which is equivalent to 0.125 megabyte per second. It’s range was very short (10 meters) and it consumed a lot of battery. It could also only connect to one device at a time. Bluetooth 1.0B (2001), Bluetooth 1.1 (2001) and Bluetooth 1.2 (2003) only came with very minor improvements.

The second generation or Bluetooth 2.0+ EDR (Enhanced Data Range) was released in 2004 and was an improvement on the first generation. It could transfer data at 2 to 3 Mbps (0.25 to 0.375 MB/s) but it didn’t improve on the range or battery consumption. A slight upgrade known as Bluetooth 2.1+ EDR was released in 2007.

The third generation promised much and delivered on it’s promise at the expense of huge battery consumption. The version 3.0+ HS (High Speed) is still used by many headphones today because it transferred data at speeds of up 24Mbps (3 MB/s) and consumed a lot of battery as well.

The fourth generation took a totally different approach and was aimed at low energy devices like fitness trackers, smartwatches, mice and keyboards, true wireless (TWS) earbuds etc. The version 4.0 LE (Low Energy) was released in 2010. Version 4.0 transfers data at 1Mbps. Further revisions included the 4.1 (2013) and 4.2 (2014).

The current generation is Bluetooth version 5.0. It improves on 4.0 by increasing data transmission speeds but maintaining low power consumption. Bluetooth 5.0 has data transmission speeds of 2 Mbps and a range of 240 meters which when compared to the old 10 meter range is massive. Current iterations include Bluetooth 5.1 and 5.2.


https://inquisitiveuniverse.com/2020/09/20/smartphone-connectivity-bluetooth-wifi-and-infrared/

Very educative thanks

DONFRANSKID:
Very educative thanks

Thanks boss

Ozemestats.

I have moved to my permanent site. WordPress wanted to kill me lol.

The link is up there as well as the complete article.

Thank you for your patience.

atheistandproud:
Ozemestats.
I have moved to my site. WordPress wanted to kill me lol.
The link is there as well as the complete article.
Thank you for your patience.

oh, this is good... lemme grab popcorn again

.

Effulgent:

oh, this is good... lemme grab popcorn again

Lol

You forgot to add NFC

johnnyn1:
You forgot to add NFC

I would add that when I'm writing on broadband network.
thank you for bringing this to my attention.

informative as always

atheistandproud:


I would add that when I'm writing on broadband network.

thank you for bringing this to my attention.

informative, and happy birthday to you

Hakeem12:
informative, and happy birthday to you

Thank you

Nice writeup... Keep it up boss

Nice write up but inside other means of connectivity yo.o.

Nice post

Kunja2:
Nice write up but inside other means of connectivity yo.o.

Working on a USB post sir

Come check out our highly interactive group on Telegram

t. me/inquisitiveuniverse (remove the spaces)

Emeka71:
I used to believe that bluetooth can't transfer apps , only multimedia items.

It can, if the app is sent in it's apk form.

But don't try sending PUBG or Fortnite via Bluetooth sha lol