Configuration and Technical details

Mobile phones are very much popular in today’s time due to its usability and user friendliness. This popularity has led to the increasing sales of mobile phones. Mobile equipment’s can be divided into four categories – Nonintelligent devices (have almost no features of intelligence), cell network based mobile devices (Generally called mobile phones), smart mobile gadgets (have some modern day features other than calling) and mobile phones which have operating systems (like Android, Symbian etc.). Users of mobile phones are able to access various kind of services (through applications) anytime and anywhere. The fundamental focus here is to make applications an integral part of the environment so that mobile phone user can interact with the device and do computing on it without knowing the details. To do that, application developers have to consider the hardware and software (OS part) characteristics of a particular mobile device and then start developing application for it for example an application made for Android based mobiles will not work on Apple iPhones like that.

Xiaomi’s Redmi Note 4 smartphone has a 5.5-inch touchscreen display with a resolution of 1080 x 1920 pixel and (Pixel Per Inch) PPI of 401. It has Octa-Core Qualcomm Snapdragon 625 processor with 2GHz frequency. As far as memory is concerned this mobile has 4GB RAM and 64GB internal storage. Memory storage can be expanded up to 128GB through microSD card. Camera quality is very good in this model. It comes with a 13-megapixel rear camera and a 5-megapixel shooter camera for great selfies at front.

Android 6.0 is the OS version in Redmi Note 4 and a non-removable battery of 4100mAh gives this mobile a long-lasting power. The dimensions of this mobile are 151.00 x 76.00 x 8.30 (height x width x thickness) and weight is just 175.00 grams. It is a dual SIM (GSM and GSM) phone which slots are Micro-SIM and Nano-SIM compatible. For data connectivity this mobile has Wi-Fi, GPS, Bluetooth, Infrared and USB OTG. Compass Magnetometer, Accelerometer, Ambient light sensor, Proximity sensor and Gyroscope are some sensors in the phone. 

Fig 1 – Redmi Note 4 (4GB + 64GB Version)

Here is the comparison of Redmi Note 4 with Samsung’s Galaxy S8 Duos and Vivo V5 Model.

Mobile Model & Pic		Xiaomi Redmi Note 4	Samsung Galaxy S8 Duos	Vivo V5
Network	Cellular Bands	LTE/ HSPA/ GSM	LTE/ HSPA/ GSM	LTE/ HSPA/ GSM
4G Bands	LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300)	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), 32(1500), 66(1700/2100), 38(2600), 39(1900), 40(2300), 41(2500)	LTE band 1(2100), 3(1800), 5(850), 40(2300)
3G Bands	HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100	HSDPA 850 / 900 / 2100
2G Bands	GSM 900 / 1800 / 1900 in SIM 1 and SIM 2	GSM 850 / 900 / 1800 / 1900 in SIM 1 and SIM 2	GSM 850 / 900 / 1800 / 1900 in SIM 1 and SIM 2
Speed	LTE, HSPA	LTE-A (4CA) Cat16 1024/150 Mbps, HSPA 42.2/5.76 Mbps	LTE, HSPA
GPRS & EDGE	Yes	Yes	Yes
Body	SIM slots	Dual SIM (Micro-SIM/Nano-SIM with dual stand-by)	Dual SIM (both Nano-SIM with dual stand-by)	Dual SIM (Micro-SIM/Nano-SIM with dual stand-by)
		– Samsung Pay (MasterCard and Visa certified) – IP68 certified              – Water and Dust proof
Weight (Grams)	165 grams	155 grams	154 grams
Dimensions (Inches)	5.94 x 2.99 x 0.33 inch	5.86 x 2.68 x 0.31 inch	6.06 x 2.97 x 0.30 inch
Display	Screen Type	Capacitive touchscreen (IPS LCD) with 16M colors	Capacitive touchscreen (Super AMOLED) with 16M colors	Capacitive touchscreen (IPS LCD) with 16M colors
Screen Size	5.5 inches	5.8 inches	5.5 inches
Resolution	1080 x 1920 pixels (~401 PPI)	1440 x 2960 pixels (~570 PPI)	720 x 1280 pixels (~267 PPI)
Screen Protection		Corning Gorilla Glass 5	Corning Gorilla Glass (unspecified version)
User Interface (UI)	– MIUI 8.0	– 3D Touch (home button only) – Always-on display – TouchWiz UI	– Funtouch OS 2.6
Platform	Operating System (OS)	Android 6.0 (Marshmallow)	Android 7.0 (Nougat)	Android 6.0 (Marshmallow)
Chipset	Qualcomm MSM8953 Snapdragon 625	Exynos 8895 Octa	Mediatek MT6750
CPU	Octa-core 2.0 GHz Cortex-A53	Octa-core (4×2.3 GHz & 4×1.7 GHz)	Octa-core 1.5 GHz Cortex-A53
GPU	Adreno 506	Mali-G71 MP20	Mali-T860MP2
Memory	Card slot	microSD, up to 256 GB (uses SIM 2 slot)	microSD, up to 256 GB (uses SIM 2 slot)	microSD, up to 256 GB (uses SIM 2 slot)
Internal	32 GB, 3 GB RAM or 64 GB, 4 GB RAM	64 GB, 4 GB RAM	32 GB, 4 GB RAM
Camera	Primary	13 MP, f/2.0, phase detection autofocus, dual-LED (dual tone) flash, check quality	12 MP, f/1.7, 26mm, phase detection autofocus, OIS, LED flash, check quality	13 MP, phase detection autofocus, LED flash, check quality
Features	1.12 µm pixel size, geo-tagging, touch focus, face detection, panorama, HDR	1/2.5″ sensor size, 1.4 µm pixel size, geo-tagging, simultaneous 4K video and 9MP image recording, touch focus, face/smile detection, Auto HDR, panorama	Geo-tagging, touch focus, face detection, panorama, HDR
Video	[email protected], [email protected], check quality	[email protected], [email protected], HDR, dual-video rec., check quality	[email protected], check quality
Secondary	5 MP, f/2.0, 1080p	8 MP, f/1.7, autofocus, [email protected], dual video call, Auto HDR	20 MP, f/2.0, 1/2.8″ sensor size, 1080p
Sound	Alert types	Vibration; MP3, WAV ringtones	Vibration; MP3, WAV ringtones	Vibration; MP3, WAV ringtones
Loudspeaker	Yes	Yes	Yes
3.5mm jack	Yes	Yes	Yes
	– 24-bit/192kHz audio – Active noise cancellation with dedicated mic	– 32-bit/384kHz audio – Active noise cancellation with dedicated mic	– 24-bit/192kHz audio – Active noise cancellation with dedicated mic
Communications	WLAN	Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, DLNA, hotspot
Bluetooth	4.1, A2DP, LE	5.0, A2DP, LE, aptX	4.0, A2DP
GPS	Yes, with A-GPS, GLONASS, BDS	Yes, with A-GPS, GLONASS, BDS, GALILEO	Yes, with A-GPS
Infrared port	Yes	No	No
Radio	FM radio	No	FM radio
USB	microUSB 2.0, USB On-The-Go	3.1, Type-C 1.0 reversible connector	microUSB 2.0, USB On-The-Go
Features	Sensors	Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass	Iris scanner, fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2	Fingerprint (front-mounted), accelerometer, proximity, compass
Messaging	SMS (threaded view), MMS, Email, Push Mail, IM	SMS (threaded view), MMS, Email, Push Mail, IM	SMS (threaded view), MMS, Email, Push Email
Browser	HTML5	HTML5	HTML5
Java	No	No	No
	– XviD/MP4/H.265 player – MP3/WAV/eAAC+/Flac player – Photo/video editor – Document viewer	– Samsung DeX (desktop experience support) – Fast battery charging (Quick Charge 2.0) – Qi/PMA wireless charging (market dependent) – ANT+ support – S-Voice natural language commands and dictation – MP4/DivX/XviD/H.265 player – MP3/WAV/eAAC+/FLAC player – Video, Photo and Document editor	– MP4/H.264 player – MP3/WAV/eAAC+/FLAC player – Document viewer – Photo/video editor
Battery	Type	Non-removable Li-Po 4100 mAh battery	Non-removable Li-Ion 3000 mAh battery	Non-removable Li-Ion 3000 mAh battery
Talk time		Up to 20 h (3G Network)
Music play		Up to 67 h
Colors	Gray, Gold, Black	Midnight Black, Orchid Gray, Maple Gold	Gold, Gray
SAR		0.44 W/kg of head and 0.75 W/kg body	0.22 W/kg of head and 0.77 W/kg body
Price	Approx. 160 EUR	Approx. 610 EUR	Approx. 250 EUR

User’s Review –

Xiaomi’s Redmi Note 4 was launched in the Indian market on 19^th Jan 2017 via online sale (Only) on two major websites www.flipcart.com and www.amazon.in. This popular mobile phone was also available on flash sale on Xiaomi’s Indian website https://www.mi.com/in.

• As per the data available on flipcart.comtotal 73,244 no of reviews and 337,666 ratings have been given till now. The average rating is 4.4 stars (where 5-star rating is for the best and 1 star is for the worst). Out of 337,666 ratings given, 227,152 are 5-star, 68,003 are 4-star, 17,276 are 3-star, 6,691 are 2-star and 18,544 are 1-star ratings. The response for this model was superb and till today this mobile phone is leading in the market in its category. 
• Awinaash Sharma (Certified buyer, 25^thJan 2017) – Got the phone on next day at my home. Till today I am very satisfied. It is very fast, camera quality is very good, 64GB/4GB variant in this much low price, 2GHz speed and metal finish. I can’t expect more in this price. I am very satisfied.
• Rashid (Certified buyer, 5^thFeb 2017) – The phone is working very fine. When I hold it on my hand it feels very light. Don’t hesitate… Go and buy it.   

• As per the data available on amazon.intotal 453 customers reviews are there. The average rating is 3.7 stars out of 5-stars. 
• Shouvik Mandal (1^stAug 2017) – Beast and the best. Best phone at this price range.
• Pratham G. (30^thJuly 2017) – Five stars. Camera quality is superb, out of the box performance, best phone is this best in this price range.

Conclusion

Redmi Note 4 is a flagship mobile phone of Xiaomi. This is one of the best phone available in the market in its category. 5.5-inch touch screen is idle for day to day working and entertainment, movie and game purpose. 4GB RAM and Snapdragon 625 octa-core gives this phone amazing power whereas 64GB internal memory gives a more than sufficient space for big applications. We can say that this mobile phone is one of the best gadget a person can have.

References

• amazon.com, 2017, https://www.amazon.in/Redmi-Note-Black-64-GB/product-reviews/B072HG4YS7/ref=cm_cr_arp_d_viewopt_sr?showViewpoints=1&filterByStar=five_star&pageNumber=1(accessed on 30 July 2017).
• flipcart.com, 2017,  https://www.flipkart.com/redmi-note-4-black-64-gb/product-reviews/itmeqe48766xqzb7?page=2&pid=MOBEQ98TABTWXGTD(accessed 30 July 2017).
• gsmarena.com. 2017, https://www.gsmarena.com/vivo_v5-8430.php(accessed on 31 July 2017)
• gsmarena.com, 2017, https://www.gsmarena.com/samsung_galaxy_s8-8161.php(accessed on 31 July 2017)
• gsmarena.com, 2017, https://www.gsmarena.com/xiaomi_redmi_note_4-8531.php(accessed on 31 July 2017)
• mi.com, 2017, https://www.mi.com/in/note4/(accessed on 31 July 2017)