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What is LiFi Technology: How it Works & How it’s better than WiFi

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What is LiFi how it works

Technology is one of the rapidly growing concepts in the world, inventing new things making things easier for humans. Li-Fi is one the lesser-known wireless technology likely to be used in future against Wi-fi for faster data transfer with many advantages.

What is LiFi Technology?

LiFi, which stands for Light Fidelity, is a wireless communications technology that uses visible light to transmit data in real time. It’s up to 100 times faster than standard WiFi. While it’s yet to reach broad use in the market, LiFi has the potential to hugely impact technology and software development, especially for IoT solutions, across sectors. 

In technical terms, Li-Fi is a light communication system that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums. In its present state, only LED lamps can be used for the transmission of data in visible light.

How LiFi Technology Works?

LiFi is high speed bidirectional networked and mobile communication of data using light. LiFi comprises of multiple light bulbs that form a wireless network.

When an electrical current is applied to a LED light bulb a stream of light (photons) is emitted from the bulb. LED bulbs are semiconductor devices, which means that the brightness of the light flowing through them can be changed at extremely high speeds. This allows us to send a signal by modulating the light at different rates. The signal can then be received by a detector that interprets the changes in light intensity (the signal) as data.

The intensity modulation cannot be seen by the human eye, and thus communication is just as seamless as other radio systems, allowing the users to be connected where there is LiFi enabled light. Using this technique, data can be transmitted from a LED light bulb at high speeds.

Applications for LiFi:

  • Traffic Management & Road Safety
  • Medical Applications
  • Aviation
  • Communication Underwater
  • Elegant Lighting
  • Interior map-reading system for blind people
  • In dangerous Environments or In Sensitive regions
  • Transportations
  • Industrial Areas

Differences between Li-Fi & Wi-Fi:

  • The Bandwidth Expansion of Wi-Fi technology is limited and exceptional for Li-Fi
  • The Speed of the Wi-Fi is150 Mbps and >10 Gbps for Li-Fi
  • The Data Density of Wi-Fi technology is low and high for Li-Fi
  • The Range of Wi-Fi is medium and low for Li-Fi
  • The Security of Wi-Fi is medium and excellent for Li-Fi
  • The power availability of Wi-Fi is low and high for Li-Fi
  • The ecological impact of Wi-Fi is medium and low for Li-Fi
  • The cost of the Wi-Fi is medium and low for Li-Fi
  • The network topologies of Li-Fi and Wi-Fi technologies is a point to point

Advantages of Li-Fi:

  • Speed-The speed of the Li-Fi is very high, and we can watch the videos without buffering.
  • Security- The light of the Li-Fi doesn’t run through the partition, therefore, it is more protected and hacking is not possible.
  • Risk-free-Li-Fi utilizes light waves which are harmless.
  • Consistent- The data transfer is more protected.

How LiFi is better than WiFi?

LiFi technology is much better than Wi-Fi in terms of speed, cost and security. Althoughit has many advantages that are discussed below.

Faster Speed

The current speed of WiFi oscillates between 11 and 300 Mbit/s, while that of LiFi is also highly variable according to the last studies carried out.

The most widely accepted speed is 10 Gbit/s, but it has been proven that it could reach 224 Gbit/s and that a 1.5 Gbit film could be downloaded in thousandths of a second.

Cost-Effective & Sustainable

It is up to 10 times cheaper than wifi, requires fewer components and uses less energy. All you have to do is turn on a light!

Accessible with No interference 

Any light fitting can easily be converted into an internet connection point, as only a simple LiFi emitter needs to be fitted. Moreover, electronic light does not interfere with radio communications, interact with other systems or compromise transmissions from aircraft, ships, etc.

Secure & Reliable

Light does not pass through walls like radio waves do, and this prevents intruders from intercepting LiFi communications through a wireless network. LiFi transmits its signal without interruptions, making communication more stable than with wifi.

More bandwidth with No Saturation

The light spectrum is 10,000 times wider than the radio spectrum, which increases the volume of data it can carry and transmit per second. Though, internet connection via light could prevent the collapse of the radio spectrum which, according to LiFi’s inventor Harald Haas, could take place by 2025.

Wireless and invisible

LiFi takes advantage of lights and dispenses with the router, so it works without the need for cables. In addition, it can operate with infrared light, which is invisible to the human eye, or with visible LED light at very low intensity so as to avoid disturbance.

Is There Really a Need to Replace WiFi?

Considering the vast applications of the internet on modern technology (and almost all basic government and daily functions cease to exist without it), perhaps there really is a need to come up with improvements to the existing WiFi technology.

This is due to the various limitations in its usage of radio frequencies as a data transfer medium. These limitations include its limited coverage, security concerns over connectivity, restriction of use due to frequency interference, and congestion of networks.

With the emergence and development of LiFi technology, many foreshadow the obsolescence of wifi and other wireless networks. We will have to wait a few more years to see if streetlights, in addition to illuminating our streets, will connect us to the internet at the speed of light.

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Smartphones

Latest Best 5G Smartphones: Specifications & Price Availability

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5G Network not yet developed in most of the countries, but 5G-enabled smartphones are being launched aggressively by the top mobile manufacturers. Yes, mobile companies are now highlighting the 5G feature into their phone to attract the customers.

But do you know, now many mobile chips or processors, especially for mid-range and high-end segment flagship phones, comes with in-built technology to support the 5G network. Anyway, in upcoming years top countries likely have the 5G network.     

Also Read: Top Five Reasons You Need to Change Your Smartphone

India is also working in this technology to bringing it into existence allowing people to enjoy high-speed internet and wireless connectivity. So, if you are planning to buy a smartphone, you should go with 5G phone, so that whenever the network will be available, you can get it first without changing your phone.

Best 5G Smartphone Under Rs 30000

Phone ModelsPOCO F3 GT 5G
(New Launch)
Xiaomi Mi 11X 5G OnePlus Nord 2 5G
(New Launch)
Display6.67 inches, 1080 x 2400p OLED, 120Hz, with 395 ppi 6.67 inches, 1080 x 2400p (Super AMOLED, 120Hz with 395 ppi 6.43 inches, 1080 x 2340p Fluid AMOLED, 90Hz with 409 ppi
Processor (CPU & GPU) Mediatek Dimensity 1200U with Mali-G77 MC9Qualcomm Snapdragon 870 5G with Adreno 650 GPUMediatek Dimensity 1200U with Mali-G77 MC9
OS/Platform Android 11, MIUI 12.5 for POCO Android 10, MIUI 12 Android 11,  OxygenOS 11.3
CameraQuad – 64MP+8MP+2MP
(16 MP front camera)
Quad – 48MP+8MP+5MP
(20 MP front camera)
Triple – 50MP+8MP+2MP
(32 MP front camera)
Memory128GB/6GB RAM, 128GB/8GB, 256GB/8GB RAM (No dedicated slot)128GB\6GB RAM, 128GB/8GB RAM with microSDXC (shared SIM slot) 128GB/6GB RAM, 128GB/8GB RAM, 256GB/12GB RAM (No dedicated slot)
Battery5065 mAh, Quick Charge 3+ with 67W 4520 mAh, fast charging 33W 4500 mAh
Fast charging 65W
Other FeaturesFingerprint (under display, optical)Fingerprint (side-mounted) & IR BlasterFingerprint (under display, optical)
PriceRs 25,999 (128GB\6GB)
Rs 27,999 (128GB\8GB)
Rs 29,999 (256GB\8GB)
Rs. 27,999 (128GB\6GB)
Rs. 29,999 (128GB\8GB)
Rs 27,999 (128GB\6GB)
Rs 29,999 (128GB\8GB)
Rs 34,999 (256GB\12GB)
AvailabilityFlipkartMi.com & AmazonOne Plus India, Amazon & Reliance Digital

Best 5G Smartphone Under Rs 25000

Phone Models Realme X7 Max 5G Xiaomi Mi 10i 5GOnePlus Nord CE 5G
Display 6.43 inches, 1080 x 2340p Super AMOLED, 120Hz with 409 ppi 6.67 inches, 1080 x 2400p (Full HD+), IPS LCD with 395 ppi 6.43 inches, 1080 x 2340p Fluid AMOLED, 90Hz with 410 ppi
Processor (CPU & GPU) Mediatek Dimensity 1200U with Mali-G77 MC9 Qualcomm Snapdragon 750G 5G with Adreno 619 GPUQualcomm Snapdragon 750G 5G with Adreno 619 GPU
OS/Platform Android 11,  Realme UI 2.0 Android 10, MIUI 12 Android 11, OxygenOS 11
Camera Triple – 64MP+8MP+2MP
(16 MP front camera)
Quad 108MP+8MP+2MP+2MP
(16 MP front camera)
Triple 64MP+8MP+2MP
(16 MP front camera)
Memory 128GB/8GB RAM, 256GB/12GB RAM (No dedicated slot)64GB\6GB, 128GB\6GB RAM, 128GB/8GB RAM with microSDXC (shared SIM slot)128GB/6GB RAM, 128GB/8GB RAM, 256GB/12GB RAM (No dedicated slot)
Battery 4500 mAh
Fast charging 50W & Reverse charging 2.5W
4820 mAh, fast charging 33W 4500 mAh
Fast charging 30W
Other Features Fingerprint (under display, optical)Fingerprint (side-mounted) & IR BlasterFingerprint (under display, optical)
Price Rs 24,999 (128GB\8GB)
Rs 27,999 (256GB\12GB)
Rs. 20,999 (64GB\6GB)
Rs. 21,999 (128GB\6GB)
Rs. 23,999 (128GB\8GB)
Rs 24,999 (128GB\8GB)
Rs 27,999 (256GB\12GB)
AvailabilityAmazon, Flipkart & Realme India Mi.com & AmazonOnePlus Website & Amazon

If you are not ready to spend not more than 25K on a 5G smartphone, you can find various options below 20K with various interesting features. So, we brought here below the top 3 best 5G phones that you can buy in less than 20K.

Best 5G Smartphone Under Rs 20000

Phone ModelsRealme 8s (New Launch) Vivo iQOO Z3Realme Narzo 30 Pro
Display6.5 inches, 1080 x 2400p AMOLED, (405 ppi density)6.58 inches, 1080 x 2400p,
IPS LCD, 401 ppi
6.5 inches, 1080 x 2340p (IPS LCD), 405 ppi density)
Processor (CPU & GPU) MediaTek Dimensity 810 5G (6 nm), with Mali-G57 MC2 GPUQualcomm Snapdragon 768G,
with Adreno 620 GPU
MediaTek MT6853 Dimensity 800U 5G with Mali-G57 MC3
OS/Platform Android 11 Android 11, Funtouch 11.1  Android 10, MIUI 12
CameraTriple 64MP+2MP+2MP
(16 MP front camera)
Triple 64MP+8MP+2MP
(16 MP front camera)
Triple 48MP+8MP+2MP
(16 MP front camera)
Memory128GB/6GB RAM, 128GB/8GB RAM with Extra 5GB Virtual RAM
Dynamic RAM Expansion(DRE)
128GB/6GB RAM, 128GB/8GB RAM, 256GB/8GB RAM, 256GB/12GB RAM with microSDXC dedicated slot64GB/6GB RAM, 128GB/8GB RAM – with microSDXC (uses shared SIM slot)
Battery5000 mAh, Fast charging 33W 4400 mAh, fast charging 55W 5000 mAh with Fast charging 30W
Other FeaturesFingerprint (under display, optical) Fingerprint (side-mounted)Fingerprint (side-mounted)
PriceRs 18,999 (128GB\6GB)
Rs 20,999 (128GB\6GB)
Rs 19,990 (128GB\6GB)
Rs 20,990 (128GB\8GB)
Rs 22,990 (256GB\8GB)
Rs 15,499 (64GB\6GB)
Rs 17,999 (128GB\8GB)
AvailabilityFlipkart & Realme WebsiteIQOO Website & AmazonRealme Website & Flipkart

And if your budget is below 15K, you can find the various interesting phones under this price segment. Check out below the latest 5G mobile under 15000 with specifications, features, price and availability.

Best 5G Smartphone Under Rs 15000

Phone ModelsXiaomi Poco M3 Pro 5G Realme 8 5GXiaomi Redmi Note 10T 5G
(New Launch)
Display6.5 inches, 1080 x 2400p IPS Display, 405 ppi6.5 inches, 1080 x 2400p, IPS LCD, 405 ppi6.5 inches, 1080 x 2400p (IPS LCD), 90Hz, 405 ppi density)
Processor (CPU & GPU)MediaTek MT6833 Dimensity 700 5G with Mali-G57 MC2MediaTek MT6833 Dimensity 700 5G with Mali-G57 MC2 GPUMediaTek MT6833 Dimensity 700 5G with Mali-G57 MC2
OS/Platform Android 11, MIUI 12Android 11, Realme UI 2.0 Android 11, MIUI 12
CameraTriple 48MP+2MP+2MP
(8 MP front camera)
Triple 48MP+2MP+2MP
(16 MP front camera)
Triple 48MP+2MP+2MP
(8 MP front camera)
Memory64GB/4GB RAM, 128GB/6GB RAM – with microSDXC (uses shared SIM slot)64GB/4GB RAM, 128GB/4GB RAM, 128GB/6GB RAM, 128GB/8GB RAM with – microSDXC (dedicated slot) 64GB/4GB RAM, 128GB/6GB RAM – with microSDXC (uses shared SIM slot)
Battery5000 mAh, Fast charging 50W 5000 mAh, fast charging 18W 5000 mAh with 18W Charging
Other FeaturesFingerprint (under display, optical) Fingerprint (side-mounted)Fingerprint (side-mounted)
PriceRs 13,999 (64GB\4GB)
Rs 15,999 (128GB\6GB)
Rs 13,999 (64GB\4GB)
Rs 14,999 (128GB\4GB)
Rs 16,999 (128GB\8GB)
Rs 13,999 (64GB\4GB)
Rs 15,999 (128GB\6GB)
AvailabilityOnly Flipkart Realme Website & FlipkartMi India & Amazon

Most probably you would be thinking about that, there are various other 5G smartphones available in the market. So, let me clear to you that these three phones come with the highest configurations and the best features at this price range in the market.

Apart from this, OnePlus Nord, Xiaomi Mi 11X 5G, Oppo Reno 5G, Vivo owned iQOO 7 5G & Samsung A72 series phones are the next best 5G supported phones in the premium segment available in the market. Anyway, if you are not willing to pay this much money, you can get 4G phones with the same configurations at a cheaper price. If you are looking for a 4G phone, currently Redmi Note 10, Realme 8 Pro & the Samsung M series are the best mid-range smartphones you can buy online with bank discount offers.

Also Read: Top Best Selling Smartwatch in India Under Rs 5000, 10000 & 15000

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Whatsapp

How to Use WhatsApp View Once Feature to Send Pictures & Videos?

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whatsapp view once feature

The world’s most widely used personalize messing mobile application WhatsApp has recently launched a new feature called View Once using that you can send secret pictures and videos that will automatically delete after the recipient has opened it. 

This feature will not only gives users more control over their privacy but also allowing them to share confidential data like OTP, Debit or Credit Card Pin and Net Banking Login password or other similar one-time transaction codes etc.

Also Read: WhatsApp OTP Scam: Know About This Online Fraud & How to Stay Safe

If you use the Whatsapp view once mode the picture, video or text message it will automatically remove from the chatbox the moment you open it. The best thing, neither it is saved in your media gallery, nor do you have the option of forwarding it to anyone else in your WhatsApp phone contact.  

How To Use WhatsApp View Once Feature?

For example, if you have visited an ATM to withdraw money using your friend’s or family member’s card and you forget your pin. You can always ask your friend or family member to write the pin on a paper and send it to you as view once media.

Also Read: How to Stop Whatsapp Media Auto Download to Gallery

And ATM pin is not something you would want to keep in your chat box forever, you would not read and destroy it as soon as you can. Because what if your phone gets snatched that very moment, you would not want the thief to read your ATM pin. So, let’s find out how to use the WhatsApp view once feature on your android and apple phone.

Steps to Send View Once Pictures and Videos on WhatsApp:

As you know it this feature has been recently rollout by the company, and if you have not recently updated your WhatsApp, just open the Google Play Store and update it with the latest version (2.21.16.20).

WhatsApp Version to use View Once Mode

Step1: After updating the app, you can open any chat window and select an image or video to send to that person.

Step2: Now select a media, you will see a small circle on the dialogue box with 1 written inside it.

Step3: Here you need to tap on the 1 circle to enable the View Once media.

Step4: When you tap on it, the media will be sent as I circle Photo or Video.

Step5: After you have sent the view once media, select the message and swipe right.

Step6: Here when you swipe right, a new window will show you whether that message has been opened or seen by the recipient.

You can use this feature to send the message to individuals as well as groups. And to check which of the group members have seen or opened the media you can select the message and swipe right. And anytime you can disable the feature by tapping on the 1 circle.

Also Read: How To Stop Someone From Adding You To A Group In Whatsapp

However, if you do not open the message for 14 days, the media remains on the Chatbox for those many days. And, after the completion of 14 days, the media will expire automatically.

Though, WhatsApp has said that the view once media is protected by end-to-end encryption so even WhatsApp cannot see them as is the case with the personal messages, but at the same time it also warned users about sending view once media to only trusted contacts.

As the view, once media feature is not supported by a screen detection feature. This means, you will never get to know whether the recipient has taken a screenshot of your media or not. Not only screenshots but the media can also be recorded using a screen recorder and the person can also use any other device to capture or record your media and share it with an unauthorized person.

Also Read: How to Enable Two Factor Authentication on Your WhatsApp Account

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Gadgets

Top Five Reasons You Need to Change Your Smartphone

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why buy a new smartphone

Technology is one of the fastest things that change at a rapid speed in every field. The smartphone is one of the highly used gadgets that you will notice comes with new engineering almost every quarter month. Over the past few years, the dynamics of smartphones have been changed with various innovations that you had never imagined in your life.

Anyway, technology will keep changing and no one can stop this as it helps us to perform various tasks easily. However, if you are still using a sophisticated phone or having an outdated smartphone you need to change your phone with the latest smartphone that will give you a totally different experience while using its functions in various situations. You can find here the five best reasons to change your smartphone to the new one.

5 Reasons Why Buy A New Smartphone

new smartphones

#1 Bigger Screen with Breezeless Display

The days are gone, when up to 5 inches screen was bigger enough to meet your mobile viewing experience, now 6 plus inches screen is the normal screen size of most of the phones that now comes with a breezeless display.

bigger screen smartphones

Even a few mobile manufacturers are now making the phones up to 6.4-6.7 inches with screen-to-body ratio gone up to 94% that provides better viewing especially when you play games, watch videos or movies and read news articles regularly.

#2 Better Processor with High Capacity RAM

RAM and mobile processors are important components in your mobile that allows you to operate your phone speedily without facing hanging or slow running issue. As of now, most of the top mobile brands are offering better performance processors with high capacity RAM allowing hassle-free multitasking with less battery consumption.

high end processor mobiles

And not only flagships but medium range smartphones are also now available with high-end processors. If you buy smartphone having at least Snapdragon 730 or Snapdragon 845 or 855 with 6 or 8GB RAM you can operate smoothly without facing any issue.

#3 Bigger Battery Life with Fast Charging

In earlier times owing to a smaller screen and fewer apps or mobile functions use the battery size was not a big concern for the users, but now the scenario is different. You would be using the various apps like Whatsapp or FB multiple times in a day or reading news or articles increasing your screen-on time that mainly consumes the mobile battery.

Now you can find more than 4000mAh battery that can give you one of more days backup even in heavy use conditions. Actually, bigger screen size is also another reason for high battery capacity so never buy 6 plus inches screen smartphone having less than 4000mAh battery otherwise you need to charge your phone very often.

And don’t worry about charging times, as most of the phone now comes with fast charging like Vooch charging or Dash charging that can charge a higher percentage of your phone’s battery within few minutes powering your phone with quick backup.

Video: Xiaomi 100W Fast Charging Test

#4 AI-Enabled High-Resolution Multiple Cameras

ai multiple camera mobile

The Camera is another segment in mobile phones that has got major improvements in the past few years. People now not buy cameras for photography instead they use phones with quick sharing or image editing options to make the photo look better. Moreover, artificial intelligence is the new technology now integrated into high-end smartphones.

Mobile companies have already integrated AI into the camera to take the photo as per the background scenes giving a natural look to photos. And high-resolution like 108MP multiple cameras can capture the photos supported with a telephoto lens and wide-angle view.

You can also find the phones having triple or more cameras for better photography even in low lighting conditions or during nights allowing you to capture anything anytime.

Also Read: 48 Megapixel Camera Phone: A New Trend Set for Smartphones to Attract Customers

Even a few flagship brand’s phones like One Plus, Xiaomi Mi Series, Oppo Reno Series and Samsung Galaxy Series Digital Hybrid Zoom comes with optical zoom to capture the pictures from a far distance or zoom the image without compromising the picture quality.

Below you can check few image samples and videos taken from Samsung Galaxy S21 Ultra 100x Zoom and Mi 11 Ultra 120X Zoom with the comparison of the photos zoomed multiple times.

why buy a new smartphone

Video: Mi 11 Ultra 120X Zoom Camera Test

Video: Samsung Galaxy S21 Ultra Camera 100X Zoom Test

#5 New Technologies – Hidden Camera and 5G Network

Apart from triple or quad cameras, companies are now in a race to make selfie cameras to be hidden inside the phone. Though, pop-up cameras are already in trend but they can also easily break down or might damage badly if dropped. So the under-display camera is the solution to keep the camera hidden as well as safe with a notch-less full-view screen.

pop up camera smartphone

How Under Display Camera Technology Works?

Companies like Xiaomi and Oppo working on an under-display camera that will work on a custom display that featuring a small transparent area made of a special low-reflective glass with high transmittance. When the selfie camera is activated, the display area over the camera lens becomes transparent in an instant, allowing light to enter.

Video: Under Display Camera Testing

And when the camera is not in use, the transparent display works like a normal one, allowing content to be a full-screen display. This display embedded camera technology combo allows more light into the lens, resulting in clearer and crisper selfies than the punch-hole camera that is also in trend among mobile manufacturers.

Similarly, 5G-enabled smartphones launch would be the new trend in the mobile market, as most of the top nations have started rolling out the 5G network bandwidth spectrum to telecoms companies that will also encourage mobile makers to manufacture 5G-supported phones that can give you an unbelievable internet speed on such gadgets.

Also Read: Latest Best 5G Smartphones: Specifications & Price Availability

Video: 5G Speed Test on Galaxy S10 5G

Using 5G you can download movies or high-end games within a few minutes or can do video calling without call-drop in a high-resolution without any trouble. Though initially, the 5G-enabled devices and data network would be not affordable, but within the next few years, it will become cheaper and accessible to mass people across the world.

Also Read: Latest Best 5G Smartphones: Specifications & Price Availability

Video: 5G vs 4G Network Upload & Download Speed Test

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