Asus Zenfone 4 Pro ZS551KL vs ZTE nubia Z20

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

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

HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO

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), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)

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3.1 Mbps download, 1.8 Mbps upload

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LTE Cat 18, 1.2 Gbps download, 221 Mbps upload

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

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2017-8

2019-8

2017-10

2019-8

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Aluminium alloy, glass

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

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

156.9 mm

158.6 mm

75.6 mm

75.2 mm

7.6 mm

9.2 mm

175 g

186 g

Moonlight white, Pure Black

Black, Blue, Red

AMOLED capacitive touchscreen

AMOLED

5.5 inches

6.42 inches

1080 x 1920 pixels

1080 x 2340 pixels

Corning Gorilla Glass 5

Scratch resistant, Corning Gorilla Glass

Yes, max 10 fingers

Yes

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Always-on display, DC dimming, HDR10

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AMOLED

-

720 x 1520 pixels

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5.1 inches

Quad-core 2.45 GHz Kryo

Single-core 2.96 GHz Kryo 485

quad-core 1.9 GHz Kryo

Triple-core 2.42 GHz Kryo 485

Quad-core 1.8 GHz Kryo 485

Qualcomm MSM8998 Snapdragon 835

Qualcomm SDM855 Snapdragon 855+

Adreno 540

Adreno 640

6 GB

6, 8 GB

64, 128 GB

128, 512 GB

microSD(uses second SIM slot)

No

256 GB

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Android 7.1.1 (Nougat)

Android 9.0 Pie; nubia 7.0

Dual

Triple

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

48 MP, f/1.7 , 26 mm, 3x optical zoom , 1/2" , 0.8 µm

16 MP, 50 mm

8 MP

16 MP, 12 mm

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8000 x 6000 pixels

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

4320@15fps, 2160p@30/60fps, 1080p@30/60fps, 720p@1920fps

laser/phase detection autofocus

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LED flash

dual-LED dual-tone flash

4-axis optical image stabilization

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

8 MP, f/1.9 , 22 mm, 1.4 µm

1080p

-

Yes

No

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

Type-C reversible connector

Type-C 1.0 reversible connector

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Yes

Yes

-

Yes

-

Yes

-

-

Yes

Yes

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SMS(threaded view)

-

MMS

-

Email

-

IM

-

Push Email

-

No

-

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

Accelerometer, compass, fingerprint, gyroscope, light, proximity

Li-Ion

Li-Po

3600 mAh

4000 mAh

50% in 32 min

Yes

27 h 30 min

-

-

500 USD