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Realme X

Xiaomi Redmi K20

Network
Technology	GSM / CDMA / HSPA / LTE	GSM / HSPA / LTE
2G bands	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
	CDMA 800 & TD-SCDMA - China
3G Network	HSDPA 850 / 900 / 1700(AWS) / 2100	HSDPA 850 / 900 / 1900 / 2100
4G Network	1, 3, 4, 5, 8, 34, 38, 39, 40, 41	1, 3, 5, 7, 8, 34, 38, 39, 40, 41
Speed	HSPA 42.2/11.5 Mbps, LTE (2CA) Cat6 300/75 Mbps	HSPA, LTE

Launch
Announced	2019, May	2019, May
Status	Available. Released 2019, July	Available. Released 2019, June

Body
Dimensions	161.2 x 76 x 9.4 mm (6.35 x 2.99 x 0.37 in)	156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)
Weight	191 g (6.74 oz)	191 g (6.74 oz)
Build	Glass front (Gorilla Glass 5), plastic back, plastic frame	Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
SIM	Dual SIM (Nano-SIM, dual stand-by)	Dual SIM (Nano-SIM, dual stand-by)

Display
Type	AMOLED	Super AMOLED, HDR
Size	6.53 inches, 105.2 cm2 (~85.9% screen-to-body ratio)	6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio)
Resolution	1080 x 2340 pixels, 19.5:9 ratio (~394 ppi density)	1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Protection	Corning Gorilla Glass 5	Corning Gorilla Glass 5

Platform
OS	Android 9.0 (Pie), upgradable to Android 10, Realme UI	Android 9.0 (Pie), upgradable to Android 10, MIUI 12
Chipset	Qualcomm SDM710 Snapdragon 710 (10 nm)	Qualcomm SDM730 Snapdragon 730 (8 nm)
CPU	Octa-core (2x2.2 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver)	Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
GPU	Adreno 616	Adreno 618

Memory
Card slot	No	No
Internal	64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 8GB RAM, 256GB 8GB RAM	64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
	UFS 2.1	UFS 2.1

Main Camera
Modules	48 MP, f/1.7, (wide), 26mm (wide), 1/2.0", 0.8µm, PDAF 5 MP, f/2.4, (depth)	48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, 53mm (telephoto), 1/4.0", 1.12µm, PDAF, 2x optical zoom 13 MP, f/2.4, 12mm (ultrawide), 1/3.1", 1.12µm
Features	LED flash, HDR	Dual-LED flash, HDR, panorama
Video	4K@30fps, 1080p@30fps (gyro-EIS), 1080p@120fps, 720p@960fps	4K@30fps, 1080p@30/120/240fps, 1080p@960fps

Selfie Camera
Modules	Motorized pop-up 16 MP, f/2.0, 25mm (wide), 1/3.06", 1.0µm	Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm
Features	HDR	HDR
Video	1080p@30fps	1080p@30fps

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes
		24-bit/192kHz Hi-Res audio

Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth	5.0, A2DP, LE, aptX HD	5.0, A2DP, LE, aptX HD
Positioning	GPS, GLONASS, BDS	GPS, GLONASS, GALILEO, BDS
NFC	No	Yes (China only)
Infrared port	No	No
Radio	FM radio	FM radio
USB	USB Type-C	USB Type-C 2.0, OTG

Features
Sensors	Fingerprint (under display, optical), accelerometer, gyro, proximity, compass	Fingerprint (under display, optical), accelerometer, gyro, proximity, compass

Battery
Type	3765 mAh, non-removable	Li-Po 4000 mAh, non-removable
Charging	20W wired, 55% in 30 min (advertised)	18W wired

Misc
Colors	Steam white, Punk Blue	Carbon black, Red flame, Glacier blue, Pearl White
SAR		1.07 W/kg (head)     0.72 W/kg (body)
Models	RMX1901, RMX1903	M1903F10I
Price	About 160 EUR	About 260 EUR

Tests
Performance	GeekBench: 5915 (v4.4)
Display	Contrast ratio: Infinite (nominal)
Loudspeaker	-28.7 LUFS (Average)
Audio quality	Noise -92.9dB / Crosstalk -93.3dB
Battery (old)	Endurance rating 86h