new smartphone

Buying a new smartphone in 2020

Whenever you think to purchase a new smartphone, you only consider some basic information like camera, storage, ram etc. But that’s not enough, Before purchasing a new mobile there are lots of things which you need to understand like what is arm cortex, what’s its value or how SAR value is necessary.

Generally, no one considers these things, but trust me knowing or learning these things will eventually help you to decide which new smartphone is exactly suitable for you. So below I’ll try to explain each and every aspect of the smartphone which will help you to understand every detail of what a mobile consist and things to learn for purchasing a new smartphone.


Now for the obvious reason, we know that gsmarena is the best website for comparing mobiles, browsing specifications etc. The real reason behind this is, gsmarena always provide every information regarding a new smartphone

So on the below article, I’ll use an exact post written by gsmarena, and try to elaborate each and every detail in an easy way. Reading this will make you think do you actually need these specs or a normal phone

Note: This post is quite long and will take more than 30 minutes to read but is highly beneficial for you. 

If you think this information is really worth it Continue reading..

So as I said i’ll use an exact post from gsmarena, As one plus 7 pro is a new smartphone and is still trending I’ll upload some screenshots of one plus 7 pros and will explain all the details of what it carries..

Why i picked one plus 7 pro for this article?

The main reason why I picked this phone was One plus 7 pro is a new phone and almost carries everything which a normal phone has sensors, processor camera features, everything. So this will make it easy for everyone to understand what your android mobile has and what you need more if you want to upgrade your phone.

One more thing all the blue colour words has a redirect link to the source. If you want to understand something in, click on the link it will redirect you to the main page.

So let’s start with network first.



android mobile

Network means things that this device needs to communicate to other networks. Basically, a new smartphone supports 4 types of technology : GSM / CDMA / HSPA / LTE.

Although the above 4 types have different bands and frequencies.

What are bands: Bands are the radio signals sent out by carriers that your android mobile connects to make calls and use data. Here if we dig deep, there are 3 technologies, 2g, 3g and 4G. All the technologies have some limited range of bands.


What are Types of network Bands in a new smartphone

Basically, network band means types of network your smartphone should support, Ex: 2G, 3G, 4G, and Even 5G as of current situation.

#Tip : If you’re thinking to buy a new smartphone for now, Purchase a 5G enabled phone

Let’s check which band works at what frequency they work

  • 2G bands supports up to: GSM 850 / 900 / 1800 / 1900 – SIM 1 & SIM 2  and CDMA 800 / 1900 & TD-SCDMA
  • 3G bands supports up to: : 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100
  • 4G bands supports up to:  LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700), 32(1500), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100) – Global

GSM- CDMA supports 2G technology.

HSDPA: Supports 3G technology

LTE: Supports 4G technology.

Let’s elaborate these 4 network types of android mobile below


  • GSM: GSM stands for Global System for Mobile Communication. It is a digital cellular technology to which is used for transmitting mobile voice and data services.
  • GSM has a ability to carry 64 kbps to 120 Mbps data rates. Previously GSM was the largest used network in old as a new smartphone.
  • GSM uses 2nd Generation technology.

  • CDMA: CDMA stands for Code Division Multiple Access. It basically sends multiple signals at the same time to occupy a single transmission channel.
  • This technology is commonly used in ultra high-frequency cellular telephone systems.
  • In India CDMA technology was provided by Reliance communications.
  • Like GSM CDMA also uses 2G technology

  • HSDPA: HSDPA stands for High-speed downlink packet access. The HSDPA  supports 3G technology.
  • HSPA is deployed over the WCDMA network on the same carrier or – for high capacity and high-speed solution

  • LTE: LTE stands for Long Term Evolution. The LTE network was firstly introduced in 2004 and is an upgrade to 3 GPP system.
  • LTE is an ideal technology to support high data rates for the services such as voice over IP (VOIP), streaming multimedia, videoconferencing or even a high-speed cellular modem.
  • Best feature of LTE is to provide high data transfer rates with low latency.
  • LTE uses 4G technology.

These details on network, bands, technologies, will help you understand how does your android mobile communication works.

Body of your mobile


android mobile

It consists of 4 things Dimension, weight, Build quality, features.

  • Dimension: Basically dimension means height, the width of a mobile, Or we can say what is the inch of mobile.
  • For an example, the Dimension of Oneplus 7 pro is 162.6 x 75.9 x 8.8 millimetre and inch wise 6.40 x 2.99 x 0.35.

  • Weight: Weight will indicate how heavy or lose does your mobile weigh. On an average, a mobile with 5 – 7 inch has a weights between 150 G to 250 G.  Here G indicates Grams.

  • Build: This will include details on what materials a mobile builds. Example front back glass, side aluminium frame, gorilla glass etc.

  • Types of Sim Card: This will tell you if the device supports single sim, dual sim, dual nano sim, dual standby etc.
  • Dual sim: Dual sim means,  You can use two sim cards in one mobile.
  • Dual Standby means both the sim slots will support 4G network simultaneously.
  • Nano-sim: Nano sim card has a small size compared to normal sim card.

# Basically all-new smartphone supports dual nano or nano sim card structure

Check which Best Display for your new smartphone


android mobile

The display is divided into 4 parts, Type, Size, Resolution and Protection etc.


  •  Nowadays there are many types of mobile display available in a new smartphone such as:
  • LCD (Liquid Crystal Display)
  • OLED (Organic Light-Emitting Diodes)
  • AMOLED (Active-matrix organic light-emitting diode)
  •  Super AMOLED (New version of AMOLED)
  • TFT (Thin-film transistor)
  • IPS (In-plane switching)

# Tip: IF you’re purchasing a new smartphone do check it has AMOLED display as it’s one of the best.


As mentioned in dimension, size column will display details on what is the size of mobile.


PPI stands Pixel per inch, For better understanding let me give you one example,

Consider an image on two mobiles, Oneplus 1 and Oneplus 7 pro, Here Oneplus 1 has a PPI of 401 and Oneplus 7 pro has a 516 PPI.

Now open the same image and try to zoom it fully, You’ll notice that Oneplus 7 has a clear pixels while zooming rather than one plus 1. In short higher the PPI more clear the image.


  • As technology increased display too got upgraded, When a mobile falls there are many chances display might get damaged, so companies came with new protection named gorilla glass protection.
  • For better understanding we can say that it’s a type of coating which is applied on a display to prevent damages.
  • There are lots of version for gorilla glass. Gorilla Glass 1, Gorilla glass 2 etc.
  • The latest one is gorilla glass 5.
  • Most of the new smartphone has gorilla glass version( 3,4,5) According to me 3 is the best

The display part of mobile is completed now let’s check main content which is hardware, Operating system and many more.


Operating system and more


Platform basically consist of 4 things OS (Operating system), chipset, CPU (Central processing unit) and GPU (Graphics processing unit)

Let’s understand every aspect one by one.

OS (Operating system)

If explained in easy way, we can say Operating system is heart of a machine, whether it may be a android mobile, computer, a microcontroller every machine needs an operating system to run some task. Also, applications are made in such a way that they are suitable to run in the installed operating system. 

In a same way mobiles too need Operating system to work

Like Windows, Linux, Ubuntu, Android are all types of operating system

In mobile Android 2.3.6 (Gingerbread) was the oldest and most used operating system between 2012 -13. As technology upgraded Operating system got upgraded. Currently Android OS 10.0 is the latest named as Android Q. Companies like Oneplus use their own OS named as Oxygen OS


 The chipset is on the motherboard and handles its features and the communication between all components. It divides the memory as per its usage. Qualcomm, Mediatek develop android mobile processors. Every processor has its own version for example Qualcomm snapdragon 650.

(TIP: A mobile which has  a snapdragon processor above 600 is able to quick charge your device If your company allows it.. )

CPU also known as processor cores

This is a most important part and probably your speed of a mobile, lag, everything is handled by CPU, Now as this vast topic I Cannot try to explain it via writing so I’ve decided to upload a similar video which will give you and exact answer on what is a CPU of a mobile (processor) and how it’s useful. Check the video below for better understanding

GPU (Graphics processing unit)

In simple words we can say GPU works like a graphic card in your android mobile, Higher the Adreno more the images and animation will load smoothly and quickly. Although high-end games like PUBG, Fortnite require high GPU to play smoothly.

As in computer, we say it has a graphic card, In android mobile, we name it with Adreno. Adreno has its own version, and for the current time, Adreno 640 is the best version available in market. So consider this feature while buying a new smartphone

That’s it here we complete the details on the platform now let’s check more information on Memory (Storage, ram) etc.

Recommended Memory in your new smartphone 


android mobile

Memory is divided into many parts when it comes for mobiles like  System allocated memory which cannot be modified, Usable memory, RAM (Random Access Memory) and External memory etc.

Now let’s elaborate all of the above one by one

System memory in mobile: Whenever you buy a mobile phone with an internal storage of 32 GB (Gigabyte) there is some space automatically allotted for system. Although it is necessary, because your whole Operating system, root files are stored it. Legally you cannot modify, rewrite or delete this memory or files present in it. And there are some genuine reasons for it, When an Os is been installed on a mobile it’s necessary that all the device drivers must load correctly on time. There must be no boot failures on a system restart.

Can System memory be modified? : Legally no but Illegally yes, Once you unlock your boot loader you have every access on system files. You can edit, modify etc. Unlocking you boot loader breaks the security in any android mobile and let’s user access everything.

(Tip: Unlocking your new smartphone will void your warranty and there are chances your device can be hacked.)

Usable memory (Internal storage)

Previously the internal storage provided was very low compared to now, as the use of data is so high that even for some user 64 GB is not enough. In 64 GB mobile, we hardly get 52 GB storage.

This storage is rewritable, we can store anything, any type of file etc.

Nowadays Samsung is developing 1 TB (Terra byte) of storage. 1 TB = 1024 GB.

 RAM (Random Access Memory)

When an application is running a ram provides memory to the application, Every application needs a suitable amount of memory to process if your device doesn’t provide that memory you app won’t run properly.

Ram is also used to save your running applications to run in the background. Higher the amount of ram more application you can access at the same time.

Features like multitasking, applications switch works through ram.

Even if you want to play a high-end game, you need to provide enough memory to the desired application so it can run better.

Like system, Ram is also a fixed memory it cannot be changed or modified in mobile.

If you’re thinking to purchase a new smartphone in future I recommended you to buy an android mobile with a minimum ram of 6 GB or 8 GB ram it will also help you to run high-end games in future.

(Tip: You need to clean your ram regularly by removing the application from taskbar.)


CARD SLOT (External memory card)

You can install an extra memory card in your mobile if you want more space. One more thing, every android mobile has its own limit to install external SD (secure digital) card.

For example in the above image you can see, there is no slot available. But if you have an extra slot in your android mobile. It will have a limit of external SD card support up to 128 GB or 256 GB.

So these were some points on storage, Now let’s check Our most preferred thing Camera.


android mobile

Here in the image above, The Main camera means Rear Camera some people also say it(Back Camera) and the Selfie camera is named as Front Camera.

According to me the evolution of the camera has been drastically changed between the past three years. Previously there was only one camera at rear that too of 8 Mega Pixel.

But nowadays companies provide 3 cameras at rear, 2 cameras at front. So I’ll try to explain what do these extra cameras do on your mobile.

Rear Camera

What does the extra camera do in mobile

  • A single-camera will normally shoot pics as per normal effects.
  • A Double camera will be used simultaneously, As one will click the picture and another one will try to focus on character and blur the background automatically. This is called as (Portrait mode )
  • A triple camera will do the 2 things above mentioned but will also use ultra-wide technology which places your camera more back than its actual position. In short it will help you to capture more things rather than adjusting yourself for proper photo.

Now As the camera works, there are lots of features working in background for example HDR, PDAF, LASER Autofocus, OIS, 3x Zoom and many more depending upon your android mobile.

So you can check on YouTube how each sensor works.

Selfie Camera 

AS Rear Camera in heavy devices selfie camera is not that complicated. It’s very simple to understand. The old phone used to have on-screen selfie camera, but nowadays pop camera has been introduced. Due to these features you won’t have any cutout (NOTCH) on your android mobile. Rather than you can enjoy a full screen display without any disturbance.

Selfie camera mostly has one camera packed with many features.

Higher the camera more the clear images will be produced.


AI (Artificial intelligence) in camera

You may have seen how camera detects our age, gender if an object is a dog, furniture or anything etc. A camera detects it, this is possible all because of AI.

How does AI work to identify a dog? : Basically a dog is placed and the picture is taken from every side also the shape size height of the dog every data is been generated and then researched.

Once they found out every possibilities that if this or any object is placed if it’s a dog the camera will focus on basic details and blur the rest. So this way lots of research is done to identify a particular object in AI. Not only this AI also learn from its mistakes.

Now for deep understanding, you need to check this video for AI cameras.

(TIP: According to me Oppo- Vivo have best cameras rather than other companies)

Video Recording

Video recording in mobile is useful for both the camera, you can record videos with the rear and front camera.

But mostly rear cameras have good image detail rather than selfie camera. Also, fps plays an important role while playing a video.

# Tip: Consider buying a new smartphone which has EIS

What is the FPS?  FPS stands for frames per second, It means how many frames generate per second for the video. Now there are lot’s of types in fps for example video will record at 1080 P(pixels) with 30 fps, 60 fps, 120 fps and many more.

Now the fps plays a important role here. For better understanding higher the fps more smooth and realistic videos will be.

If you want to experience it Search on YouTube for 60 fps video and play it with 1080P resolution and after watching the video play the same video in 480P resolution.

You’ll understand the major difference here.

So if you found a camera with a recording of 1920*1080 60 fps, trust me you’re going to enjoy the quality of video.

NOTE: Shooting videos in 60 fps will take more memory rather than a normal HD video.


android mobile
  • I don’t think you need a understanding thing for sound as loudspeaker and 3.5 mm headphone jack is present mostly in all device except some variants of i-phone.
  • Nowadays some companies provide a USB OTG (OVER THE GO) converter through which you can plug that cable in your charging port and on another hand you can connect your earphones in it.
  • One more thing Active noise cancellation is available on every phone. Active noise cancellation cuts extra noise from your surrounding and focuses on closer voice to device
  • For clear understanding: While in a traffic, if you get a call from a friend he would only listen to your voice rather than a horn or vehicle noise. The ratio is 80-20.

TIP: There are earphones available too with noise cancellation feature (Good for playing pubg :P)

  • Dolby Atmos provides a realistic sound compared to normal speakers. Recently in the year of 2017-2019, many companies provide Dolby Atmos for better sound quality.
  • That’s all for sound now let’s head toward communication section.

Check this one  ⇓ which is on amazon


Noise Tune Charge Neckband Bluetooth Wireless Earphones




android mobile

  • Communication has a good impact on the overall phone. A feature like NFC are now been provided by every company. Previously only Sony used to provide this feature on their Top range phones.
  • Communication basically includes WI-FI, Bluetooth, GPS, NFC, RADIO, USB.

Let’s understand all the details one by one below:

WLAN (Wireless Local Area Network)

Now we all may be familiar with the usage of wi-fi as it’s easily available everywhere. Airport, Station, MC Donald’s, and at many other places. But what does the number 802.11 a/b/g/n/ac means ?

Wifi 802.11 a is an IEEE standard for transmitting data over a wireless network. We can also say a/b/g/n/ac are the different versions of it. Every version has it’s own benefit for example:

  • 802.11/a uses 5 GHz frequency of data band and supports speed of 54 Mbps (megabit) or 6.5 (megabyte) per seconds.
  • 802.11/b only supports a data transfer rate of 11 Mbps.
  • A 802.11/g only supports a data transfer of 54 Mbps but uses 2.4 GHz.
  • The 802.11/n uses both 2.5 GHz and 5 GHz frequency bands.
  • And 802.11/ac is the latest version developed in 2016. It works on 5 GHz bands and has a transfer speed up to least 1 gigabit per second (1 G bit/s) and single-link throughput of at least 500 megabits per second (0.5 G bit/s)

Now if any mobile has a single criterion or we can say a single version just understand it will support the router which has the same version listed in your new smartphone (All the routers made today at least support 802.11 a,b,g so you don’t need to worry.)

What is dual-band WI-Fi?

Basically dual-band WI-Fi allows functioning both 2.5 GHz and 5 GHz in your android mobile. As the single band is mostly used in every mobile but it reduces the speed or limits the speed till 50 Mbps because it only supports 2.5 GHz, but a dual-band supports both 2.5 GHz and 5 GHz so if you’re using Jio Gigafiber and have a top speed up to 500 Mbps your mobile will utilize the whole speed.

What is WI-Fi direct:

WI-Fi is called WI-Fi P2P(Peer to Peer) connection. Here 2 device can connect to each other without any internet access. Wi-Fi direct is compatible will all modern smartphones. All you need to do is go to your settings, head toward WI-Fi select WI-Fi direct turn it on both device and pair it like a Bluetooth.

Now when 2 devices are connected to each other, both of them can send files directly. Also WI-Fi direct has a good transfer rate rather than Bluetooth.

A simple example: Applications like Flash Transfer, Software data cable uses this technology.

DLNA  (‘Digital Living Network Alliance’)

DLNA: DLNA is an industry-wide standard for sharing data over a home network. Through this you can stream videos from your laptop to TV, print your documents from laptop to printer without connection.

What is a Hotspot:  You can share your internet to your friends mobile via hotspot.  All you need to do is head towards your android mobile settings, click on Wi-Fi settings, find turn on portable hotspot and turn on your mobile data.

Once your friend enters correct credentials he can use his internet on your phone.

Nowadays even WiFi routers can become a hotspot.

check this one.
android mobile


Today Bluetooth is today used everywhere, sending files, connecting to smartwatches, listening songs on Bluetooth headsets etc. The current version of Bluetooth is 5.0. Although it’s latest and has various improvements rather than 4.0. Still if you’ve a 4.0 Bluetooth device and want to connect to version 5, you can pair it.

How to turn on Bluetooth? 

Open your mobile settings, head towards Bluetooth, click to turn on and search for desired devices. Once you find your device click on it and select pair.


GPS (Global positioning system)

GPS is used to find a location whether it may be Mumbai or America you can find every road, railway tracks here. There are some applications made for GPS such as Google maps, Waze and Sygic etc. Also through GPS, you can track your friends or any device by sharing live location. This feature was introduced in the year 2018.

There are two frequency bands used in GPS

  • Single frequency band
  • Dual-frequency band

There are 3 types of frequency band L1, L2, L5

The one which uses only L1 frequency band is called as Single band

And the one which uses L1+ L2, L2+ L5 are called as Dual Band.

Now for the full explanation, you need to refer this blog. 

There are 4 types of a navigation system which are explained below:

  • Glonass: provides a civilian radio navigation-satellite service
  • Galileo: Here the receivers will be able to combine the signals from both Galileo and GPS satellites to greatly increase the accuracy.
  • (SBAS) support wide-area or regional augmentation through the use of additional satellite-broadcast messages. Using measurements from the ground stations, correction messages are created and sent to one or more satellites for broadcast to end-users as a differential signal
  • BDS: BDS is divided into two parts, the original one (BeiDou) using geosynchronous satellites to provide coverage in Asia, and a next-generation one (BDS) using medium-earth-orbit satellites (as does GPS) to provide global coverage.

NFC (Near field communication)

Mostly used for transactions or payments through smartphones. We can also use NFC to send and receive files. I still remember Sony phones had NFC way to before than now. With just a tap you could send files.

As the name suggests Near field communication, it works on small distance like between 4 cm, if you move your device from its limit, connection is lost.

The communication process is fast and consumes less battery as compared to Bluetooth.

Not only file sharing, electronic tags, make payments are some features of NFC.

#Tip: NFC is a great and secure technology, but it doesn’t matter that your new smartphone should have NFC, you can skip it.


As we all know what a radio is and how does it work. You need to change the station according to its value and then you can here content aired on that network.

Nowadays radio is not so active or used as compared to previous days.

USB (Universal serial bus)

When it comes to charging your device, listen to music via a converter, transfer your files to another device like Computer. USB helps us a lot.

Previously phones used to have 2.0 micro USB data cable which is still being used in today’s phones. But a company like apple already provided USB type C cable for its use.

Micro USB has a low transfer speed rather than type C 3.1. Also, the quality is much better compared to micro USB cable.

The one major advantage of USB Type-C cable is you can plug it from any direction.


android mobile

Fingerprint scanner: It is used to unlock your phone with a fingerprint. Also, some phones have placed their fingerprint sensor on display.

Accelerometer: The auto-rotate feature works through the accelerometer sensor. Also when you flip your phone and your phone gets silent this is also done by accelerometer sensor.

Gyro sensor: No matter how you handle your phone, the gyro sensor will detect it easily. For the best example we can say while playing PUBG you can tilt your phone to change the direction of your aim. This is possible because of the gyro sensor.

proximity sensor: Turns your display On-Off on a call when you place it near your ear. Basically, it’s programmed in such a way if a light block between defined radius it will turn off display or vice versa. Nowadays pocket gesture also uses proximity sensor.

Compass: This sensor is used to detect your position, whether you are in north, south, east or west.


android mobile

Battery is non-removable and mostly built above 3000 mAh (mili amp hour). A normal 3000 mAh battery can easily last up to 1 day if your UI is not heavy and filled with less bloatware.

In 2016 fast-charging technology version was 2.0 Quick charge but in 2017 the companies introduced quick charge 3.0. Basically, 2.0 will charge a 4000 mAh battery in 2 hours 30 mins. While a 3.0 quick charge will charge your device within 1 hour.

# Tip Consider buying a phone which as almost 4000 mAh battery or more

As I said earlier that you’re investing an amount on a new smartphone so why not pick a best one with little research.

That’s it for things you should know before buying a new smartphone, I really think this blog will help you in some way or another, but if you genuinely like the blog do comment it encourages me to write more useful content.

Note: The videos and the redirect links to the blogs are just used as a reference, Blogsbarrel doesn’t promote any of the above things. 

Credit for uploaded images goes to gsmarena official website. I don’t claim any rights to them. 

Credit for featured images goes to Him

If you found something wrong do let me know in the comment section below.

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