Realme U1 vs Apple iPhone 6S vs Xiaomi Redmi Note 4

Height
Height6.18 inches
Height5.44 inches
Height5.94 inches
Width
Width2.91 inches
Width2.64 inches
Width2.99 inches
Thickness
Thickness0.31 inches
Thickness0.28 inches
Thickness0.33 inches
Weight
Weight168 g
Weight143 g
Weight165 g
Color
ColorAmbitious Black, Brave Blue, Fiery Gold
ColorSpace Gray, Silver, Gold, Rose Gold
ColorDark Gray, Gold, Black, Lake Blue (64/4GB model)
Color
ColorFiery Gold
ColorRose Gold
ColorBlack
Build
Build
BuildFront glass, aluminum body
BuildFront glass, aluminum body

Screen Size
Screen Size6.3 inches
Screen Size4.7 inches
Screen Size5.5 inches
Display Type
Display TypeLTPS IPS LCD capacitive touchscreen
Display TypeIPS LCD capacitive touchscreen
Display TypeIPS LCD capacitive touchscreen
Display Resolution
Display Resolution1080 x 2340 pixels
Display Resolution750 x 1334 pixels
Display Resolution1080 x 1920 pixels
Pixel Density
Pixel Density409 ppi
Pixel Density326 ppi
Pixel Density401 ppi
Protection
ProtectionCorning Gorilla Glass 3
ProtectionIon-strengthened glass, oleophobic coating
Protection
Screen to Body Ratio
Screen to Body Ratio83.90%
Screen to Body Ratio65.60%
Screen to Body Ratio72.70%
Display Type
Display TypeLTPS IPS LCD
Display TypeIPS LCD
Display TypeIPS LCD
Screen Resolution
Screen Resolution1080X2340
Screen Resolution750X1334
Screen Resolution1080X1920
Display Size
Display Size6.25 inch to 6.5 inch
Display Size4.5 inch to 4.75 inch
Display Size5.25 inch to 5.5 inch

Cores
Cores8
Cores2
Cores8
GPU
GPUMali-G72 MP3
GPUPowerVR GT7600 (six-core graphics)
GPUAdreno 506
RAM
RAM3 GB RAM
RAM2 GB RAM
RAM3 GB RAM
Chipset
ChipsetMediatek Helio P70
ChipsetApple A9
ChipsetQualcomm MSM8953 Snapdragon 625
OS
OSAndroid 8.1 (Oreo) ColorOS 5.2
OSiOS 9, upgradable to iOS 12.3
OSAndroid 6.0 (Marshmallow), upgradable to 7.0 (Nougat) MIUI 10
Chipset GP
Chipset GPMediatek Helio P70 (12nm)
Chipset GPApple A9 (14 nm)
Chipset GPQualcomm MSM8953 Snapdragon 625 (14 nm)
CPU
CPUOcta-core (4x2.1 GHz Cortex-A73 4x2.0 GHz Cortex-A53)
CPUDual-core 1.84 GHz Twister
CPUOcta-core 2.0 GHz Cortex-A53

RAM/Internal Storage
RAM/Internal Storage64 GB, 4 GB RAM or 32/64 GB, 3 GB RAM
RAM/Internal Storage16/32/64/128 GB, 2 GB RAM
RAM/Internal Storage64/32/16 GB, 4/3/2 GB RAM
Storage
Storage64 GB
Storage128 GB
Storage32 GB
Expandable Memory
Expandable MemorymicroSD, up to 256 GB (dedicated slot)
Expandable MemoryNo
Expandable MemorymicroSD, up to 256 GB (uses shared SIM slot)

Dual Camera
Dual Camera13 MP, f/2.2|2 MP, f/2.4, depth sensor
Dual Camera
Dual Camera
Autofocus
AutofocusAF
AutofocusPDAF
AutofocusPDAF
Back Camera Video
Back Camera Video1080p30fps, 720p90fps
Back Camera Video2160p30fps, 1080p60fps,1080p120fps, 720p240fps
Back Camera Video1080p30fps, 720p120fps
Back Camera Features
Back Camera FeaturesLED flash, HDR, panorama
Back Camera FeaturesDual-LED dual-tone flash, HDR
Back Camera FeaturesDual-LED dual-tone flash, panorama, HDR
Single Camera
Single Camera
Single Camera12 MP, f/2.2, 29mm (standard), 1/3, 1.22 micron
Single Camera13 MP, f/2.0, 1.12 micron

Single Camera
Single Camera25 MP, f/2.0, 1/2.8, 0.9 micron
Single Camera5 MP, f/2.2, 31mm (standard)
Single Camera5 MP, f/2.0
Front Camera Video
Front Camera Video1080p30fps
Front Camera Video1080p30fps
Front Camera Video1080p30fps
Front Camera Features
Front Camera FeaturesHDR
Front Camera FeaturesFace detection, HDR, panorama
Front Camera Features

HeadPhone Jack
HeadPhone JackYes
HeadPhone JackYes
HeadPhone JackYes
Loudspeaker
LoudspeakerYes
LoudspeakerYes
LoudspeakerYes
Audio Features
Audio FeaturesActive noise cancellation with dedicated mic
Audio Features16-bit/44.1kHz audio|Active noise cancellation with dedicated mic
Audio Features24-bit/192kHz audio|Active noise cancellation with dedicated mic

Battery Capacity
Battery Capacity3500 mAh
Battery Capacity1715 mAh
Battery Capacity4100 mAh
User Replaceable
User ReplaceableNon-removable
User ReplaceableNon-removable
User ReplaceableNon-removable
Charging
ChargingFast battery charging 10W
Charging
Charging
Battery Capacity
Battery Capacity3500 mAh
Battery Capacity1715 mAh
Battery Capacity4100 mAh
Battery Type
Battery TypeLi-Ion
Battery TypeLi-Ion
Battery TypeLi-Po
Talk Time
Talk Time
Talk TimeUp to 14 h (3G)
Talk Time
Music Time
Music Time
Music TimeUp to 50 h
Music Time

WLAN
WLANWi-Fi 802.11 b/g/n, WiFi Direct, hotspot
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot
WLANWi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot
GPS
GPSYes, with A-GPS, GLONASS
GPSYes, with A-GPS, GLONASS, GALILEO, QZSS
GPSYes, with A-GPS, GLONASS, BDS
Radio
RadioFM radio
RadioNo
RadioFM radio
USB
USBmicroUSB 2.0, USB On-The-Go
USB2.0, proprietary reversible connector
USBmicroUSB 2.0, USB On-The-Go
SIM
SIMDual SIM (Nano-SIM, dual stand-by)
SIMNano-SIM
SIMHybrid Dual SIM (Micro-SIM/Nano-SIM, dual stand-by)
Network Support
Network SupportGSM / HSPA / LTE
Network SupportGSM / CDMA / HSPA / EVDO / LTE
Network SupportGSM / HSPA / LTE
NFC
NFC
NFCYes (Apple Pay only)
NFC

Sensors
SensorsFingerprint (rear-mounted), accelerometer, proximity, compass
SensorsFingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
SensorsFingerprint (rear-mounted), accelerometer, gyro, proximity, compass

Announced On
Announced On2018, November
Announced On2015, September
Announced On2017, January
Status
StatusAvailable. Released 2018, December
StatusAvailable. Released 2015, September
StatusAvailable. Released 2017, January