Realme XT vs Mi A3 vs Redmi K20

Bluetooth
Bluetooth5.0, A2DP, LE
Bluetooth5.0, A2DP, LE, aptX HD
Bluetooth5.0, A2DP, LE, aptX HD
OSN
OSNAndroid
OSNAndroid
OSNAndroid

Height
Height6.25 inches
Height6.04 inches
Height6.17 inches
Width
Width2.96 inches
Width2.83 inches
Width2.93 inches
Thickness
Thickness0.34 inches
Thickness0.33 inches
Thickness0.35 inches
Weight
Weight183 g
Weight173.8 g
Weight191 g
Color
ColorPearl White, Pearl Blue
ColorKind of Gray, Not just Blue, More than White
ColorCarbon black, Red flame, Glacier blue
Build
BuildFront/back glass (Gorilla Glass 5), plastic frame
BuildBack glass (Gorilla Glass 5), aluminum frame
BuildFront/back glass, aluminum frame
Color
ColorPearl Blue
ColorMore than White
ColorGlacier blue

Screen Size
Screen Size6.4 inches
Screen Size6.01 inches
Screen Size6.39 inches
Display Type
Display TypeSuper AMOLED capacitive touchscreen
Display TypeSuper AMOLED capacitive touchscreen
Display TypeAMOLED capacitive touchscreen
Display Resolution
Display Resolution1080 x 2340 pixels
Display Resolution720 x 1560 pixels
Display Resolution1080 x 2340 pixels
Pixel Density
Pixel Density402 ppi
Pixel Density286 ppi
Pixel Density403 ppi
Aspect Ratio
Aspect Ratio19.5:9
Aspect Ratio19.5:9
Aspect Ratio19.5:9
Protection
ProtectionCorning Gorilla Glass 5
ProtectionCorning Gorilla Glass 5
ProtectionCorning Gorilla Glass 5
Screen to Body Ratio
Screen to Body Ratio84.70%
Screen to Body Ratio80.3%
Screen to Body Ratio86.1%
Screen Resolution
Screen Resolution1080X2340
Screen Resolution720X1560
Screen Resolution1080X2340
Display Size
Display Size6.25 inch to 6.5 inch
Display Size6 inch to 6.25 inch
Display Size6.25 inch to 6.5 inch

OS
OSAndroid 9.0 (Pie), planned upgrade to Android 10.0 ColorOS 6
OSAndroid 9.0 (Pie) Android One
OSAndroid 9.0 (Pie) MIUI 10
GPU
GPUAdreno 616
GPUAdreno 610
GPUAdreno 618
Cores
Cores8
Cores8
Cores8
RAM
RAM8 GB RAM
RAM6 GB RAM
RAM6 GB RAM
Chipset GP
Chipset GPQualcomm SDM712 Snapdragon 712 (10 nm)
Chipset GPQualcomm SDM665 Snapdragon 665 (11 nm)
Chipset GPQualcomm SDM730 Snapdragon 730 (8 nm)
CPU
CPUOcta-core (2x2.3 GHz Kryo 360 Gold 6x1.7 GHz Kryo 360 Silver)
CPUOcta-core (2x2.0 GHz Kryo 260 Gold 6x1.8 GHz Kryo 260 Silver)
CPUOcta-core (2x2.2 GHz Kryo 470 Gold 6x1.8 GHz Kryo 470 Silver)

RAM/Internal Storage
RAM/Internal Storage64GB 4GB RAM, 64GB 6GB RAM, 128GB 8GB RAM
RAM/Internal Storage64 GB, 4 GB RAM or 128 GB, 6 GB RAM
RAM/Internal Storage256 GB, 8 GB RAM or 64/128 GB, 6 GB RAM
Storage
Storage128 GB
Storage128 GB
Storage128 GB
Expandable Memory
Expandable MemorymicroSD, up to 256 GB (dedicated slot)
Expandable MemorymicroSD, up to 256 GB (uses shared SIM slot)
Expandable MemoryNo

Quad Camera
Quad Camera64 MP, f/1.8, (wide), 1/1.7, 0.8 micron|8 MP, f/2.3, 13mm (ultrawide), 1/4, 1.12 micron|2 MP, f/2.4, 1/5, 1.75 micron (dedicated macro camera)|2 MP, f/2.4, 1/5, 1.75 micron, depth sensor
Quad Camera
Quad Camera
Autofocus
AutofocusPDAF
AutofocusPDAF
AutofocusPDAF
Back Camera Video
Back Camera Video2160p30fps, 1080p30/60/120fps, 720p960fps, gyro-EIS
Back Camera Video2160p30fps, 1080p30/60/120fps
Back Camera Video2160p30fps, 1080p30/120/240fps, 1080p960fps
Back Camera Features
Back Camera FeaturesLED flash, HDR, panorama
Back Camera FeaturesLED flash, HDR, panorama
Back Camera FeaturesDual-LED flash, HDR, panorama
Triple Camera
Triple Camera
Triple Camera48 MP, f/1.8, (wide), 1/2, 0.8 micron|8 MP, (ultrawide), f/2.2, 1.12 micron|2 MP, f/2.4, depth sensor
Triple Camera48 MP, f/1.8, 26mm (wide), 1/2, 0.8 micron|8 MP, f/2.4, 53mm (telephoto), 1/4, 1.12 micron, 2x optical zoom|13 MP, f/2.4, 12mm (ultrawide), 1/3, 1.12 micron

Single Camera
Single Camera16 MP, f/2.0, 1/3.1, 1.0 micron
Single Camera32 MP, f/2.0, 0.8 micron
Single CameraMotorized pop-up 20 MP, f/2.2, 0.8 micron
Front Camera Video
Front Camera Video1080p30fps
Front Camera Video1080p30fps
Front Camera Video1080p30fps
Front Camera Features
Front Camera FeaturesHDR, panorama
Front Camera FeaturesHDR
Front Camera FeaturesHDR

HeadPhone Jack
HeadPhone JackYes
HeadPhone JackYes
HeadPhone JackYes
Loudspeaker
LoudspeakerYes
LoudspeakerYes
LoudspeakerYes
Audio Features
Audio FeaturesDolby Atmos
Audio FeaturesActive noise cancellation with dedicated mic
Audio Features24-bit/192kHz audio|Active noise cancellation with dedicated mic

Battery Capacity
Battery Capacity4000 mAh
Battery Capacity4030 mAh
Battery Capacity4000 mAh
User Replaceable
User ReplaceableNon-removable
User ReplaceableNon-removable
User ReplaceableNon-removable
Charging
ChargingFast battery charging 20W (VOOC Flash Charge 3.0)
ChargingFast battery charging 18W (Quick Charge 3)
ChargingFast battery charging 18W
Battery Capacity
Battery Capacity4000 mAh
Battery Capacity4030 mAh
Battery Capacity4000 mAh
Battery Type
Battery TypeLi-Po
Battery TypeLi-Po
Battery TypeLi-Po

WLAN
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
GPS
GPSYes, with A-GPS, GLONASS, GALILEO, BDS
GPSYes, with A-GPS, GLONASS, BDS
GPSYes, with A-GPS, GLONASS, GALILEO, BDS
Radio
RadioFM radio
RadioFM radio
RadioYes
USB
USB2.0, Type-C 1.0 reversible connector
USB2.0, Type-C 1.0 reversible connector
USB2.0, Type-C 1.0 reversible connector, USB On-The-Go
SIM
SIMDual SIM (Nano-SIM, dual stand-by)
SIMDual SIM (Nano-SIM, dual stand-by)
SIMDual SIM (Nano-SIM, dual stand-by)
Network Support
Network SupportGSM / HSPA / LTE
Network SupportGSM / HSPA / LTE
Network SupportGSM / HSPA / LTE
NFC
NFC
NFC
NFCYes

Sensors
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compass
SensorsFingerprint (under display), accelerometer, gyro, proximity, compass
SensorsFingerprint (under display), accelerometer, gyro, proximity, compass

Announced On
Announced On2019, September
Announced On2019, July
Announced On2019, May
Status
StatusAvailable. Released 2019, September
StatusAvailable. Released 2019, July
StatusAvailable. Released 2019, June