Side-by-side comparison

Asus Zenfone 4 Pro ZS551KL vs Xiaomi Redmi K20 Pro

Name: Asus Zenfone 4 Pro ZS551KL
Brand: Asus
SKU: appsapk-1167
Rating: 8.9 (924 reviews)

Asus

Asus Zenfone 4 Pro ZS551KL

8.9924 views

Xiaomi

Xiaomi Redmi K20 Pro

8.71,167 views

Wins 2 specs

Asus Zenfone 4 Pro ZS551KL — quick specs

Network
LTE / HSPA / GSM
Display
5.5 inches · 1080×1920
Camera
12 MP
Memory
6 GB RAM
Battery
3600 mAh
OS
Android 7.1

Xiaomi Redmi K20 Pro — quick specs

Network
LTE / HSPA / GSM
Display
6.39 inches · 1080×2340
Camera
48 MP
Memory
6 GB RAM
Battery
4000 mAh
OS
Android 9.0

● Full specification comparison

Spec

Asus Zenfone 4 Pro ZS551KL

Xiaomi Redmi K20 Pro

NETWORK

Technology

GSM / HSPA / LTE

Technology

AGSM / HSPA / LTE

BGSM / HSPA / LTE

2G bands

GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2

2G bands

AGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2

BGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2

3G bands

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

HSDPA 850 / 900 / 1900 / 2100

3G bands

AHSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100

BHSDPA 850 / 900 / 1900 / 2100

4G bands

LTE 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)

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

4G bands

ALTE 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)

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

Speed

HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 or 100 Mbps

HSPA 42.2/5.76 Mbps, LTE-A

Speed

AHSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 or 100 Mbps

BHSPA 42.2/5.76 Mbps, LTE-A

LAUNCH

Announced

2017, August

2019, May

Announced

A2017, August

B2019, May

Status

Available. Released 2017, October

Available. Released 2019, June

Status

AAvailable. Released 2017, October

BAvailable. Released 2019, June

BODY

Dimensions

156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in)

156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)

Dimensions

A156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in)

B156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)

Weight

175 g (6.17 oz)

191 g (6.74 oz)

Weight

A175 g (6.17 oz)

B191 g (6.74 oz)

SIM

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

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

SIM

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

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

Build

Front/back glass (Gorilla Glass 5) & aluminum frame

Front/back glass (Gorilla Glass 5), aluminum frame

Build

AFront/back glass (Gorilla Glass 5) & aluminum frame

BFront/back glass (Gorilla Glass 5), aluminum frame

DISPLAY

Type

AMOLED capacitive touchscreen, 16M colors

Super AMOLED capacitive touchscreen, 16M colors

Type

AAMOLED capacitive touchscreen, 16M colors

BSuper AMOLED capacitive touchscreen, 16M colors

Size

5.5 inches, 83.4 cm2 (~70.3% screen-to-body ratio)

6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio)

Size

A5.5 inches, 83.4 cm2 (~70.3% screen-to-body ratio)

B6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio)

Resolution

1080 x 1920 pixels, 16:9 ratio (~401 ppi density)

1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)

Resolution

A1080 x 1920 pixels, 16:9 ratio (~401 ppi density)

B1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)

Protection

Corning Gorilla Glass 5

Protection

ACorning Gorilla Glass 5

BCorning Gorilla Glass 5

PLATFORM

Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4

Android 9.0 (Pie); MIUI 10

AAndroid 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4

BAndroid 9.0 (Pie); MIUI 10

Chipset

Qualcomm MSM8998 Snapdragon 835 (10 nm)

Qualcomm SDM855 Snapdragon 855 (7 nm)

Chipset

AQualcomm MSM8998 Snapdragon 835 (10 nm)

BQualcomm SDM855 Snapdragon 855 (7 nm)

CPU

Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)

Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)

CPU

AOcta-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)

BOcta-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)

GPU

Adreno 540

Adreno 640

GPU

AAdreno 540

BAdreno 640

MEMORY

Card slot

microSD, up to 1 TB (uses shared SIM slot)

Card slot

AmicroSD, up to 1 TB (uses shared SIM slot)

BNo

Internal

64GB 6GB RAM, 128GB 6GB RAM

64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM

Internal

A64GB 6GB RAM, 128GB 6GB RAM

B64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM

MAIN CAMERA

Dual

12 MP, f/1.7, 25mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, Laser AF, 4-axis OIS 16 MP, 50mm (telephoto), 1/3.1", 1.0µm, AF, 2x optical zoom";

—

Dual

A12 MP, f/1.7, 25mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, Laser AF, 4-axis OIS 16 MP, 50mm (telephoto), 1/3.1", 1.0µm, AF, 2x optical zoom";

B—

Triple

—

48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF, Laser AF 8 MP, f/2.4, 53mm (telephoto), 1/4", 1.12µm, PDAF, Laser AF, 2x optical zoom 13 MP, f/2.4, 12mm (ultrawide), 1/3", 1.12µm";i

Triple

A—

B48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF, Laser AF 8 MP, f/2.4, 53mm (telephoto), 1/4", 1.12µm, PDAF, Laser AF, 2x optical zoom 13 MP, f/2.4, 12mm (ultrawide), 1/3", 1.12µm";i

SELFIE CAMERA

Single

8 MP, f/1.9, 1/3.2", 22mm (wide), 1.4µm, PDAF"

Motorized pop-up 20 MP, f/2.2, 0.8µm"

Single

A8 MP, f/1.9, 1/3.2", 22mm (wide), 1.4µm, PDAF"

BMotorized pop-up 20 MP, f/2.2, 0.8µm"

SOUND

Loudspeaker

Yes, dual speakers

Yes

Loudspeaker

AYes, dual speakers

BYes

3.5mm jack

Yes 24-bit/192kHz audio DTS sound Active noise cancellation with dedicated mic

Yes 24-bit/192kHz audio Active noise cancellation with dedicated mic

3.5mm jack

AYes 24-bit/192kHz audio DTS sound Active noise cancellation with dedicated mic

BYes 24-bit/192kHz audio Active noise cancellation with dedicated mic

COMMS

WLAN

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

WLAN

AWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

BWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

Bluetooth

5.0, A2DP, EDR, LE, aptX

5.0, A2DP, LE, aptX HD

Bluetooth

A5.0, A2DP, EDR, LE, aptX

B5.0, A2DP, LE, aptX HD

GPS

Yes, with A-GPS, GLONASS, BDS, GALILEO

Yes, with dual-band A-GPS, GLONASS, BDS, GALILEO

GPS

AYes, with A-GPS, GLONASS, BDS, GALILEO

BYes, with dual-band A-GPS, GLONASS, BDS, GALILEO

USB

Type-C 1.0 reversible connector

2.0, Type-C 1.0 reversible connector, USB On-The-Go

USB

AType-C 1.0 reversible connector

B2.0, Type-C 1.0 reversible connector, USB On-The-Go

Radio

FM radio

Yes

Radio

AFM radio

BYes

Infrared port

Yes

—

Infrared port

AYes

B—

NFC

Yes

Yes (China only)

NFC

AYes

BYes (China only)

FEATURES

Sensors

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

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

Sensors

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

BFingerprint (under display, optical), accelerometer, gyro, proximity, compass

BATTERY

Charging

Fast battery charging 18W: 50% in 32 min

Fast battery charging 27W (Quick Charge 4+)

Charging

AFast battery charging 18W: 50% in 32 min

BFast battery charging 27W (Quick Charge 4+)

Battery Type

Non-removable Li-Ion 3600 mAh battery

Non-removable Li-Po 4000 mAh battery

Battery Type

ANon-removable Li-Ion 3600 mAh battery

BNon-removable Li-Po 4000 mAh battery

MISC

Colors

Moonlight white, Pure Black

Carbon black, Flame red, Glacier blue, Summer Honey, Pearl White

Colors

AMoonlight white, Pure Black

BCarbon black, Flame red, Glacier blue, Summer Honey, Pearl White

Models

Z01GD

M1903F11I

Models

AZ01GD

BM1903F11I

Price

About 550 USD

About 359 USD

Price

AAbout 550 USD

BAbout 359 USD

Cells highlighted in green indicate a measurably better spec on that phone (battery capacity, RAM, storage, display size). Text-only specs are shown side by side without highlighting.

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