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Xiaomi Redmi K20 Pro/Mi 9T Pro review

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Nokia Lumia 520

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Nokia Lumia 920

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Network Technology GSM / HSPA GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - all versions GSM 850 / 900 / 1800 / 1900 - RM-821, RM-820
3G Network HSDPA 900 / 2100 - RM-914 HSDPA 850 / 900 / 1900 / 2100 - RM-821, RM-820
  HSDPA 850 / 1900 / 2100 - RM-915
  HSDPA 850 / 1700 / 1900 / 2100 - RM-917
4G Network LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) - RM-821
  LTE band 4(1700/2100), 17(700) - RM-820 (AT&T)
Speed HSPA 21.1/5.76 Mbps HSPA 42.2/5.76 Mbps, LTE Cat3 100/50 Mbps
Launch Announced 2013, February. Released 2013, April 2012, September
Status Discontinued Available. Released 2012, November
Body Dimensions 119.9 x 64 x 9.9 mm, 75.7 cc (4.72 x 2.52 x 0.39 in) 130.3 x 70.8 x 10.7 mm, 99 cc (5.13 x 2.79 x 0.42 in)
Weight 124 g (4.37 oz) 185 g (6.53 oz)
Build Plastic body
SIM Micro-SIM Micro-SIM
Display Type IPS LCD capacitive touchscreen, 16M colors IPS LCD capacitive touchscreen, 16M colors
Size 4.0 inches, 45.5 cm2 (~59.3% screen-to-body ratio) 4.5 inches, 57.6 cm2 (~62.5% screen-to-body ratio)
Resolution 480 x 800 pixels, 5:3 ratio (~233 ppi density) 768 x 1280 pixels, 5:3 ratio (~332 ppi density)
Protection Scratch-resistant glass Corning Gorilla Glass 2
  PureMotion HD+ ClearBlack display
Platform OS Microsoft Windows Phone 8, upgradable to 8.1 Microsoft Windows Phone 8, upgradable to 8.1
Chipset Qualcomm MSM8227 Qualcomm MSM8960 Snapdragon S4 Plus
CPU Dual-core 1.0 GHz Dual-core 1.5 GHz Krait
GPU Adreno 305 Adreno 225
Memory Card slot microSD, up to 64 GB (dedicated slot) No
Internal 8GB 512MB RAM 32GB 1GB RAM
Main Camera Modules 5 MP, f/2.4, 28mm (wide), 1/4", AF 8 MP, f/2.0, 26mm (wide), 1/3", AF, OIS
Features Carl Zeiss optics, dual-LED flash
Video 720p@30fps 1080p@30fps
Selfie Camera Modules No 1.3 MP
Video 720p@30fps
Sound Loudspeaker Yes Yes
3.5mm jack Yes Yes
 Active noise cancellation with dedicated mic Dolby Headphone
Active noise cancellation with dedicated mic
Comms WLAN Wi-Fi 802.11 b/g/n, hotspot Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, hotspot
Bluetooth 4.0, A2DP, LE/ aptX after WP8 Denim update 4.0, A2DP, EDR, LE/ aptX after WP8 Denim update
GPS Yes, with A-GPS, GLONASS Yes, with A-GPS, GLONASS
NFC Yes
Infrared port No No
Radio FM Radio FM radio
USB microUSB 2.0 microUSB 2.0
Features Sensors Accelerometer, proximity Accelerometer, gyro, proximity, compass
Battery   Removable Li-Ion 1430 mAh battery (BL-5J) Non-removable Li-Ion 2000 mAh battery (BP-4GW)
Charging Qi wireless charging
Stand-by Up to 360 h (3G) Up to 400 h (2G) / Up to 400 h (3G)
Talk time Up to 14 h 40 min (2G) / Up to 9 h 40 min (3G) Up to 17 h (2G) / Up to 10 h (3G)
Music play Up to 61 h Up to 67 h
Misc
Colors Yellow, red, cyan, white/black Black, Gray, Red, Yellow, White
SAR 0.77 W/kg (head)     1.08 W/kg (head)     0.91 W/kg (body)    
SAR EU 1.09 W/kg (head)     0.70 W/kg (head)    
Price About 70 EUR About 210 EUR
Tests Display Contrast ratio: 834:1 (nominal) / 1.161:1 (sunlight) Contrast ratio: 1065:1 (nominal) / 2.107:1 (sunlight)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker Voice 68dB, noise 69dB, ring 66dB Voice 61dB, noise 64dB, ring 65dB
Audio quality Noise -82.3dB / Crosstalk -81.8dB Noise -78.9dB / Crosstalk -75.0dB
Battery life 49h endurance rating 44h endurance rating

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