Phone Comparison - Xiaomi Redmi K20 vs Realme X2 vs Samsung Galaxy A51

Price Comparison (India)

general General Info

Manufacturer Xiaomi Realme Samsung
Announced May 2019 Released 2019, September December 2019
Status Coming soon. Exp. release 2019, July 17 Coming Soon - December 17, 2019 Coming Soon - December 12, 2019
Price Rs. 21,999 ($0.00) [Similarly Priced] Rs. 16,999 ($0.00) [Similarly Priced] Rs. 23,999 ($0.00) [Similarly Priced]
Colors Carbon black, Flame red, Glacier blue Pearl White, Pearl Blue Prism Crush White, Black, Pink, Blue
Form Factor Candybar Candybar Candybar
Dimension 156.7 x 74.3 x 8.8 mm
(6.17 x 2.93 x 0.35 in)
158.7 × 75.2 × 8.6 mm
(6.25 × 2.96 × 0.34 in)
158.4 x 73.7 x 7.9 mm
(6.24 x 2.9 x 0.31 in)
Weight 191 g (6.74 oz) 182 g (6.42 oz) 172 g (6.07 oz)
SIM Type Dual SIM (Nano-SIM, dual stand-by) Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)
2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 40(2300), 41(2500) LTE (unspecified)
Messaging
Build Features - Fingerprint Sensor(In-display)
- Fingerprint Sensor(In-display)
- Fingerprint Sensor(In-display)

hardware Hardware and OS

OS Android 9.0 (Pie) Android 9.0 (Pie), planned upgrade to Android 10.0 Android 9.0 (Pie)
User Interface MIUI 10 ColorOS 6 One UI
Processor Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver), Qualcomm SDM730 Snapdragon 730 (8 nm) Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver), Qualcomm SDM730 Snapdragon 730G (8 nm) Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm)
GPU Adreno 618 Adreno 618 Mali-G72 MP3
RAM 8 GB 8GB 8 GB
Internal Memory 256 GB 128GB 128 GB
External Memory No microSD, up to 256 GB (dedicated slot) microSD, up to 512 GB (dedicated slot)

display Display

Type AMOLED Capacitive Touchscreen, Corning Gorilla Glass 5 Full HD+ Super AMOLED Capacitive Touchscreen, Corning Gorilla Glass 5 Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen
Colors 16M colors 16M colors 16M colors
Size 6.39 inches 6.4 inches 6.5 inches
Resolution 1080 x 2340 pixels (403 ppi) 1080 x 2340 pixels (403 ppi) 1080 x 2340 pixels (396 ppi)
Screen-to-Body Ratio 86.23% - 89.06%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio Yes FM radio FM radio
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 48 MP + 8 MP + 13 MP 64 MP + 8 MP + 2 MP + 2 MP 48 MP + 12 MP + 5 MP + 5 MP
Flash Dual-LED Flash LED Flash LED Flash
Features 48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF
8 MP, f/2.4, 53mm (telephoto), 1/4", 1.12µm, PDAF, 2x optical zoom
13 MP, f/2.4, 12mm (ultrawide), 1/3", 1.12µm
HDR, Panorama
64 MP, f/1.8, (wide), 1/1.7", 0.8µm, PDAF
8 MP, f/2.3, 13mm (ultrawide), 1/4", 1.12µm
2 MP, f/2.4, 1/5", 1.75µm (dedicated macro camera)
2 MP, f/2.4, 1/5", 1.75µm, depth sensor
HDR, panorama
48 MP, f/1.8, (wide), 1/2", 0.8µm, PDAF
12 MP, f/2.2, 13mm (ultrawide)
5 MP, f/2.2, depth sensor
5 MP, f/2.4, macro camera
Panorama, HDR
Video 2160p@30fps, 1080p@30/120/240fps, 1080p@960fps 2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS 2160p@30fps, 1080p@30fps
Front Camera Motorized pop-up 20 MP, f/2.2, 0.8µm, HDR, 1080p@30fps [Similar] 32 MP, f/2.0, 0.8µm
HDR, 1080p@30fps [Similar]
32 MP, f/2.0, 25mm (wide)
HDR
1080p@30fps [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA 42.2/5.76 Mbps, LTE-A HSPA 42.2/11.5 Mbps, LTE-A HSPA, LTE-A
Bluetooth 5.0, A2DP, LE, aptX HD 5.0, A2DP, LE 5.0, A2DP, LE
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, 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/ac, dual-band, Wi-Fi Direct, hotspot
USB 2.0, Type-C 1.0 reversible connector, USB On-The-Go 2.0, Type-C 1.0 reversible connector 2.0, Type-C 1.0 reversible connector, USB On-The-Go
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS
Browser Yes Yes

memory User Memory

Internal 256 GB, 8 GB RAM or 64/128 GB, 6 GB RAM 128GB, 8GB RAM or 128GB, 6GB RAM or 64GB, 4GB RAM (UFS2.1) 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 64 GB, 4 GB RAM
Expandable Storage No microSD, up to 256 GB (dedicated slot) microSD, up to 512 GB (dedicated slot)
USB OTG Supported Not Supported Supported

Apps Sensors

Fingerprint fingerprint supported fingerprint supported fingerprint supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
Magnetic-Field Sensor (Compass) magnetic field sensor present magnetic field sensor present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor present gyroscope sensor present
NFC NFC supported NFC not supported NFC not supported

battery Battery

Type Non-removable Li-Po Battery
Fast battery charging 18W
Non-removable Li-Po Battery
Fast battery charging 30W: 67% in 30 min (VOOC Flash Charge 3.0)
Non-removable Li-Po Battery
Fast battery charging 15W
Capacity 4000 mAh 4000 mAh 4000 mAh
Stand by - - -
Talk Time - - -