Nowadays mobiles are becoming more powerful and better with time, nowadays You will get  a good mobile phone under ₹25000 which gives you a flagship like experience. In the budget of  ₹25,000 you can get a flagship level mobile phone.

You can get a good Samsung mobile phone, in this price bracket, you have a good battery in Samsung's mobile phones, good camera, good display, you will get it and talking about the software, the company says that  you will get  3 years Software updates. You will not find any junk in Samsung's phone, it comes with Samsung OneUI which is very clean and interactive. Almost all the phones are getting better nowadays, which is mid-range also, it is competing with the flagship one, you get good processor, good display, good battery and fast charging support in midrange phone, while in flagship smartphones you have to pay a little more money than the midrange phones. There is something different about the flagship smartphones  as you get features like High Refresh Rate, Water Resistant and Wireless Charging in it.

As far as we talk about the effect of  processor, some are different, some have a little more battery, some have less battery, some have more powerful processor , in some the refresh rate of the display is higher, then there is some point but all are almost similar. 

Let's talk about which are the smartphones which are in the range of 25000 and you should take and here I would like to tell that all the phones are good, you will get everything good in it, the processor, display, battery of all the phones, everything is good. And you will not feel any regret after taking this phone, you can use it comfortably for two-three years. As far as we talk about Samsung phones, all Samsung phones will be found in the range of 25000, here I will tell you a little about 5G phones and within 25000 you will get very good smartphones which are from Samsung. You already know that the value of Samsung is the highest in the market and most of the phones are sold by Samsung itself.

Samsung Galaxy M51 has a 6.5-inch Super AMOLED plus display. The Samsung Galaxy M51 runs Android 10. You can upgrade it Android 11 with Samsung OneUI 3.1. If we talk about the performance of this phone it has Qualcomm Sanpdragon 730G(8nm) octa-core processor. Samsung Galaxy M51 Packs with a Super Monster battery. It has 7000mAh monster battery which gives you a better experience in terms of performance and a long backup. Samsung Galaxy M51 has a 64-megapixel primary camera, 12MP ultraWide angle lens, a 5-megapixel depth camera and a 5-megapixel macro camera. It has a 32-megapixel camera on the front for taking selfies. It comes with various variants of RAM and Internal storage. Samsung Galaxy M51 supports 25W of fast charging.

In India there is race between many companies under ₹10000 price bracket mobile phones. They want to be first in the market. Today mobile phones are getting cheap and powerful. A midrange smartphone is better than a flagship smartphone because in midrange smartphone they also have a powerful processor, battery, camera, and AMOLED display as well as 90Hz , 120Hz and even 144Hz.  They are getting more powerful time to time. If we talk about the 10000 price bracket there are multiple phones of multiple mobile companies  available offline or online. Many companies launch a bunch a smartphones in a month.  Also 5G is a new technology that all the smartphones manufacturers adopt. In ₹10000 there is no such smartphone which offer 5G in today. We will see 5G technology in future. They also have a better feature and specs :-

Today mobile phones are getting cheap and powerful time to time. If we talk about the 15000 price segment there are lots of mobiles phones available in the market. Many companies launch a bunch a smartphones in a month. The mobile are going more powerful and efficient in today's world. Also 5G is a new technology that all the smartphones manufacturers adopt. In this price bracket there are lots of mobile phones including 5G as well.  

Body: 164 x 75.8 x 8.9 mm (6.46 x 2.98 x 0.35 in)

Weight : 205 g (7.23 oz) Glass front, plastic back.

Display: 6.5 inch IPS display, 102.0 cm2 (~82.1% screen-to-body ratio) 

resolution - 720 x 1600 pixels, 20:9 ratio (~270 ppi density).

Processor: Mediatek MT6765 Helio P35 (12nm) CPU Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53).

Memory: microSDXC (dedicated slot) Internal 2GB/32GB , 3GB/32GB, 4GB/64GB, 4GB/128GB, 6GB/128GB eMMC 5.1 storage type

Battery: 5000mAh; 15W Fast charging.

OS/Software version: Android 10 upgradable to Android 11 OneUI core 3.1.

Rear camera:48 MP, f/2.0, 26mm (wide), AF

5 MP, f/2.2, 123˚ (ultrawide)

2 MP, f/2.4, (macro)

2 MP, f/2.4, (depth)

Rear camera Video recording: 1080p@30fps.

Front camera Video recording: 1080p@30fps.

Front camera: 8 MP, f/2.2(wide).

Other: Side Mounted Fingerprint sensor, 3.5mm headphone jack.

Price : - ₹12,999

WLAN - Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Mobile Hotspot

Bluetooth version - 5.0, A2DP, LE

NFC - Yes(region dependent)

USB - USB Type-C 2.0

GPS - Yes, with A-GPS, GLONASS, GALILEO, BDS.

The fifth generation of mobile networks 5G, from the previous generations of mobile technology 2G, 3G and 4G networks. 5G  offers us much more faster connection speeds than the previous networks. 5G is more reliable network with lower response time and huge capacity.

5G operates in the same way, but 5G uses higher radio frequencies. In  5G technology this allows to carry more information at a much faster rate than the other remaining networks. The higher bands which are used in 5G network is called "millimeter waves" (mmwaves). They were not used previously but they have been opened up for licensing by the regulators. 5G equipment is expensive.

Price :- ₹21,999  

The Realme 8 5G is an another phone in this price segment. Realme 8 5G appears as the successor to the Realme 7 5G. It has a few downgrades specs. It is the cheapest 5G phone in the world.

Price :- ₹14999

Price :- ₹14590

Samsung Galaxy A32 5G is the new Awesome series from Samsung. The Korean company Samsung clearly decided to focus on its best-selling line in this price segment. Samsung did a great job with the latest Galaxy A series phones. Samsung tagline the new 'Awesome is for everyone'  fits in this series. Samsung galaxy devices such as Galaxy A32, A52 and even the Galaxy A72. Samsung also made 5G versions of the A52 and A32 smartphones. The 5G variants of these smartphones tend to target the same price bracket as their 4G models.

Price :- ₹24790

A Barcode reader is an input device used for reading printing barcode Universal Product Code(UPC) available on product to be sold. A barcode reader emits of the beam of light which reflect of the barcode image on light sensitive detector in the barcode reader identifies the barcode image by recognising special bars at both the input of the image. A perfect example of a barcode reader is used in a Supermarket where Barcode scanner is the price of a product. A barcode is a machine-readable representation of information in the form of a strip of dark and light inks.

Optical Mark Reader is also known as Optical Mark Recognition. It is the process of detecting the presence of intendent market responses. It is mainly used to detect marks on a paper. It uses a beam of light that is reflected on the paper with mark to capture presence and absence of data(marks) The OMR interprets the pattern of marks into a data record and sends this to the computer for storage, analysis and reporting. OMR  is widely used to read the answer of objective type tests,  voting applications and other evaluation studies.

Optical Character Recognition is a technique for the scanning of printed page, translating it and then using the OCR software to recognize the image as ASCII text that is editable. It translates the array of dots into text that the computer can interpret as words and letters. OCR  is widely used technique for acquiring the textual data from image. It is used in many applications such as telephone bills, electricity bills, insurance premium etc. OCR technology is being developed for greater accurate recognition and is also known as Intelligent Character Recognition (ICR).

Magnetic Ink Character Recognition read the characters by examining their shape in a matrix form and the information is then passed on to the computer. The characters are printed using a special ink which contains iron particles that can be magnetized. It is generally used in banks to process the cheques for recognizing the magnetic encoding numbers printed at the bottom of a cheque.

It is a device which is used to access the microprocessor of a Smart card. There are two kinds of a smart card :-

A.  Memory card and B. Microprocessor cards 

Memory cards are the task which contain only non-volatile memory storage component and some specific security logic. Microprocessor card  contain volatile memory and microprocessor component. The card is made up of plastic generally PVC. Smart cards are used in large companies and organizations for a stronger security authentication.

Biometric sensor is a device which recognizes physical or behavioral traits of the individual. Biometric sensors are used for marking attendance of employees or student in organization and institution. As biometric sensors working with accuracy so these are widely used in security purpose also.

It is used to convert the data and image on paper into digital form. Scanner is an optical input device and uses light as an input source to convert an image into an electronic form that can be stored on the computer. Scanner can be used for storing the document in their original form that can be modified and manipulated in later on. The scanner stores images in both gray scale and color mode.

The most common types of scanner are as follows:-

A. Handheld Scanner:-  As they are very small in size which can be held in a hand. These are less expensive and less wide .Hence in order to scan a single page, image, multiple passes are required. But there handiness is a major advantage of handheld scanner.

B. Flatbed Scanner :- They are large and more expensive scanner that create high quality images.  Flatbed scanners have a flat surface on which the printed image to be scanned .These scanners can scan a page in a single pass.

C. Drum Scanners :- They are medium size scanners with rolling drum. The sheet is fed through the scanners so that the drum rolls over the entire sheet to be scanned(just as the sheets are fed in a fax machine).

We can send input to the computer through a special manual input device called microphone or mic. Mic converts the received sound into computer format which is called Digitised sound or Digital audio. To convert the voice into digital form you need an additional hardware known as Sound card. Sound is used most often in multimedia where we can make our presentations more attractive using the recorded narration, music or sound effects. A microphone can be attached to a computer for record sound.  Now a days, microphones are also being used with speech recognition software. This means that we do not have to speak and the spoken words  appear in our documents.

It is a video capturing device. Webcam is a digital camera attached to computers and can be used for video conferencing, online chatting etc. A camera connected to a computer allows anyone those are connected to the internet to view either a  still picture or motion video of a user or other object. Now-a-days webcam are either embedded into the display with a laptop and computer or connected via USB or firewire port or Wi-Fi to the computer system.

PC Card is a Credit Card size memory or input and output(I/O) device that fits into a personal computer usually on notebook on laptop computer. Probably the most common use of a PC card is the telecommunications modem for notebook computer system.

An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing to the outside world. Some of the commonly used output devices are monitors, printers, plotters, speakers, headphones and projectors etc.

Speaker is an output device that receives sound in the form of electric currents. It needs a sound card connected to a CPU that generate sound via a cards. These are used for listening music for being audible in seminars during presentations etc. Computer speakers are the speakers which are attached internally and externally to a computer system.

Headphone are a pair of a small loudspeaker or less commonly a single speaker held close to a user ears and connected to a signal source such as an  audio amplifier, radio, CD player or portable media player. They are also known as stereo phones, headsets etc.

Projector is an output device which is used to project information from a computer onto a large screen so it can be viewed by a large group of people simultaneously. These are widely used for classroom training or conference halls and in meetings with a large audience. projector  provides a temporary output display. There are two types of projector LCD projector and DLP projectors.

Ans. MP is an audio coding format for Digital audio which uses of form of losses data compression.

Ans. The I/O devices that are attached externally to the computer system machine are also called peripheral devices. These are hardware.

Ans. A speech recognition software can interpret voice data into words that can be understood by the computer.

Ans. A dumb terminal is simply an output device that accepts data from the CPU.