Product
Xiaomi Mi 9
Xiaomi Mi 9
Xiaomi Redmi K20 Pro Premium
Xiaomi Redmi K20 Pro Premium
Battery
Charging 27W wired, QC4 20W wireless 27W wired, QC4
Type Li-Po 3300 mAh, non-removable Li-Po 4000 mAh, non-removable
Body
Build Glass front (Gorilla Glass 6), glass back (Gorilla Glass 5), aluminum frame Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Dimensions 157.5 x 74.7 x 7.6 mm (6.20 x 2.94 x 0.30 in) 156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 173 g (6.10 oz) 191 g (6.74 oz)
Comms
Bluetooth 5.0, A2DP, LE, aptX HD 5.0, A2DP, LE, aptX HD
Infrared port Yes -
NFC Yes Yes
Positioning GPS (L1+L5), GLONASS (L1), BDS (B1), GALILEO (E1+E5a), QZSS (L1+L5) GPS (L1+L5), GLONASS (G1), BDS (B1), GALILEO (E1+E5a)
Radio No Yes
USB USB Type-C 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection Corning Gorilla Glass 6 Corning Gorilla Glass 5
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size 6.39 inches, 100.2 cm2 (~85.2% screen-to-body ratio) 6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio)
Type Super AMOLED, HDR10 Super AMOLED, HDR10
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
  Virtual proximity sensing -
Launch
Announced 2019, February 20. Released 2019, March 25 2019, September. Released 2019, September
Status Discontinued Discontinued
Main Camera
Features Laser AF, Dual-LED flash, HDR, panorama Laser AF, Dual-LED flash, HDR, panorama
Triple 48 MP, f/1.8, 27mm (wide), 1/2.0", 0.8µm, PDAF 12 MP, f/2.2, 54mm (telephoto), 1/3.6", 1.0µm, PDAF, 2x optical zoom 16 MP, f/2.2, 13mm (ultrawide), 1/3.0", 1.0µm, PDAF 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
Video 4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps 4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps
Memory
Card slot No No
Internal 64GB 6GB RAM, 64GB 8GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM 128GB 8GB RAM, 512GB 8GB RAM, 512GB 12GB RAM
  UFS 2.1 UFS 2.1
Misc
Colors Lavender Violet, Ocean Blue, Piano Black Carbon black, Flame red, Glacier blue, Summer Honey, Pearl White
Models M1902F1G -
SAR 0.99 W/kg (head)     1.04 W/kg (body)     -
SAR EU 1.39 W/kg (head)     1.30 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 20, 28, 38, 39, 40 - Global 1, 3, 5, 7, 8, 34, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (5CA) Cat18 1200/150 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  1, 2, 3, 4, 5, 7, 8, 12, 17, 34, 38, 39, 40, 41 - China CDMA 800 & TD-SCDMA
Our Tests
Audio quality Noise -93.9dB / Crosstalk -91.9dB -
Battery (old) Endurance rating 95h -
Camera Photo / Video -
Display Contrast ratio: Infinite (nominal), 3.921 (sunlight) -
Loudspeaker Voice 70dB / Noise 74dB / Ring 81dB -
Performance AnTuTu: 372006 (v7) GeekBench: 11181 (v4.4) GFXBench: 35fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SM8150 Snapdragon 855 (7 nm) Qualcomm SM8150 Snapdragon 855+ (7 nm)
CPU Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485) Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.8 GHz Kryo 485)
GPU Adreno 640 Adreno 640 (700 MHz)
OS Android 9.0 (Pie), upgradable to Android 10, MIUI 12.5 Android 10, MIUI 11
Selfie camera
Features HDR HDR
Single 20 MP, f/2.0, (wide), 1/3", 0.9µm Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack No Yes
Loudspeaker Yes Yes
  - 24-bit/192kHz Hi-Res audio