Asus Zenfone 4 Pro ZS551KL vs Xiaomi Redmi K20

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900, CDMA 800

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100

HSDPA 850, 900, 1700, 1900, 2100, TD-SCDMA 1900, 2000

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 41(2500) - US, Canada, Brazil; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 40(2300), 41(2500) - India

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)

42.2 Mbps

42 Mbps

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3.1 Mbps download, 1.8 Mbps upload

LTE-A, (3CA) Cat12, 600 Mbps download, 150 Mbps upload

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2017-8

2019-5

2017-10

2019-6

-

Aluminium alloy, glass

Hybrid Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual SIM stand-by)

156.9 mm

156.7 mm

75.6 mm

74.3 mm

7.6 mm

8.8 mm

175 g

191 g

Moonlight white, Pure Black

Black, Blue, Red

AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen

5.5 inches

6.39 inches

1080 x 1920 pixels

1080 x 2340 pixels

401 ppi

403 ppi

Corning Gorilla Glass 5

2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 6

Yes, max 10 fingers

Yes

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HDR 10, Always-On display

Quad-core 2.45 GHz Kryo

Dual-core 2.2 GHz Kryo 470

quad-core 1.9 GHz Kryo

Hexa-core 1.8 GHz Kryo 470

Qualcomm MSM8998 Snapdragon 835

Qualcomm Snapdragon 730

Adreno 540

Adreno 618

6 GB

6, 8 GB

64, 128 GB

64, 128, 256 GB

microSD(uses second SIM slot)

No

256 GB

-

-

UFS 2.1

Android 7.1.1 (Nougat)

MIUI V10.2 (Android 9.0 Pie)

Dual

Triple

12 MP, f/1.7 , 25 mm, 2x optical zoom

48 MP, f/1.8 , 26 mm, 2x optical zoom , 1/2" , 0.8 µm

16 MP, 50 mm

8 MP, 53 mm, f/2.4 , 1/4" , 1.12 µm

13 MP, f/2.4 , 12 mm, 1/3" , 1.12 µm

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8000 x 6000 pixels

2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps

2160p@30fps, 1080p@960fps

laser/phase detection autofocus

-

LED flash

dual LED flash

4-axis optical image stabilization

-

25mm (1/2.55" sensor size, 1.4 µm pixel size), 50mm (1/3.1" sensor size, 1.0 µm pixel size), geo-tagging, touch focus, face detection, HDR, panorama

Autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro mode, RAW, phase detection

8 MP, f/1.9 , 22 mm, 1.4 µm

20 MP, f/2.2 , 18 mm

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5184 x 3880 pixels

1080p

1080p@30fps

Yes, dual speakers

Yes

Vibration; MP3, WAV ringtones

-

-

Yes

-

No

FM radio

-

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

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Yes

-

Yes

Yes

-

Yes

-

Yes

-

Yes

-

-

Yes

Yes

-

SMS(threaded view)

-

MMS

-

Email

-

IM

-

Push Email

-

No

-

Fingerprint (front-mounted), accelerometer, color spectrum, compass, gyro, proximity

Accelerometer, proximity, light, compass, in-display fingerprint, gyroscope, barometer, hall, step detector, step counter

Li-Ion

Li-Po

3600 mAh

4000 mAh

50% in 32 min

Qualcomm Quick Charge 4+

27 h 30 min

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