Side-by-side comparison

Asus Zenfone 4 Pro ZS551KL vs Samsung Galaxy S25 Ultra 5G

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

Samsung

Samsung Galaxy S25 Ultra 5G

8.9

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

Samsung Galaxy S25 Ultra 5G — quick specs

Network
5G / LTE / CDMA
Display
—
Camera
200 MP
Memory
512 GB
Battery
5000 mAh
OS
Android 15

● Full specification comparison

Spec

Asus Zenfone 4 Pro ZS551KL

Samsung Galaxy S25 Ultra 5G

NETWORK

Technology

GSM / HSPA / LTE

2G GSM / 3G WCDMA / 4G LTE / 5G

Technology

AGSM / HSPA / LTE

B2G GSM / 3G WCDMA / 4G LTE / 5G

2G bands

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

—

2G bands

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

B—

3G bands

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

—

3G bands

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

B—

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)

—

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)

B—

Speed

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

—

Speed

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

B—

LAUNCH

Announced

2017, August

—

Announced

A2017, August

B—

Status

Available. Released 2017, October

Available. Released 2025

Status

AAvailable. Released 2017, October

BAvailable. Released 2025

BODY

Dimensions

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

H: 162.8 mm, W: 77.6 mm, D: 8.2 mm

Dimensions

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

BH: 162.8 mm, W: 77.6 mm, D: 8.2 mm

Weight

175 g (6.17 oz)

218 g

Weight

A175 g (6.17 oz)

B218 g

SIM

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

1× or 2× nano-SIM and 2× eSIM

SIM

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

B1× or 2× nano-SIM and 2× eSIM

Build

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

Slate

Build

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

BSlate

DISPLAY

Type

AMOLED capacitive touchscreen, 16M colors

6.9 in (498 ppi),

Type

AAMOLED capacitive touchscreen, 16M colors

B6.9 in (498 ppi),

Size

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

—

Size

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

B—

Resolution

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

—

Resolution

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

B—

Protection

Corning Gorilla Glass 5

—

Protection

ACorning Gorilla Glass 5

B—

PLATFORM

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

All except S25 FE: / Android 15, up to 7 major Android upgrades, One UI 7 / S25 FE: Android 16, up to 7 major Android upgrades, One UI 8.5

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

BAll except S25 FE: / Android 15, up to 7 major Android upgrades, One UI 7 / S25 FE: Android 16, up to 7 major Android upgrades, One UI 8.5

Chipset

Qualcomm MSM8998 Snapdragon 835 (10 nm)

All except S25 FE: Qualcomm Snapdragon 8 Elite For Galaxy (3 nm) / S25 FE: Samsung Exynos 2400

Chipset

AQualcomm MSM8998 Snapdragon 835 (10 nm)

BAll except S25 FE: Qualcomm Snapdragon 8 Elite For Galaxy (3 nm) / S25 FE: Samsung Exynos 2400

CPU

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

2x 4.47 GHz Oryon (Phoenix L) and 6x 3.53 GHz Oryon (Phoenix M)

CPU

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

B2x 4.47 GHz Oryon (Phoenix L) and 6x 3.53 GHz Oryon (Phoenix M)

GPU

Adreno 540

Adreno 830

GPU

AAdreno 540

BAdreno 830

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

256/512 GB, 1 TB

Internal

A64GB 6GB RAM, 128GB 6GB RAM

B256/512 GB, 1 TB

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—

Video

—

4K@30/60fps, 1080p@30/60/120/240fps

Video

A—

B4K@30/60fps, 1080p@30/60/120/240fps

Single

—

200 MP, f/1.7, 24mm (wide), 1/1.3",

Single

A—

B200 MP, f/1.7, 24mm (wide), 1/1.3",

SELFIE CAMERA

Single

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

12 MP, f/2.2, 26mm (wide), 1.12μm, dual pixel PDAF / HDR, HDR10+ / 4K@30/60fps, 1080p@30fps

Single

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

B12 MP, f/2.2, 26mm (wide), 1.12μm, dual pixel PDAF / HDR, HDR10+ / 4K@30/60fps, 1080p@30fps

SOUND

Loudspeaker

Yes, dual speakers

Stereo speakers, Dolby Atmos

Loudspeaker

AYes, dual speakers

BStereo speakers, Dolby Atmos

3.5mm jack

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

3.5mm jack

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

BNo

COMMS

WLAN

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

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

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/ax, dual-band

Bluetooth

5.0, A2DP, EDR, LE, aptX

5.x

Bluetooth

A5.0, A2DP, EDR, LE, aptX

B5.x

GPS

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

GPS

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

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

USB

Type-C 1.0 reversible connector

USB Type-C

USB

AType-C 1.0 reversible connector

BUSB Type-C

Radio

FM radio

—

Radio

AFM radio

B—

Infrared port

Yes

—

Infrared port

AYes

B—

NFC

Yes

NFC

AYes

BYes

FEATURES

Sensors

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

Fingerprint, accelerometer, gyro, proximity, compass, barometer

Sensors

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

BFingerprint, accelerometer, gyro, proximity, compass, barometer

BATTERY

Charging

Fast battery charging 18W: 50% in 32 min

Super fast charging 2.0 at 45W

Charging

AFast battery charging 18W: 50% in 32 min

BSuper fast charging 2.0 at 45W

Battery Type

Non-removable Li-Ion 3600 mAh battery

Li-ion 5000 mAh

Battery Type

ANon-removable Li-Ion 3600 mAh battery

BLi-ion 5000 mAh

MISC

Colors

Moonlight white, Pure Black

—

Colors

AMoonlight white, Pure Black

B—

Models

Z01GD

Titanium Silverblue, Titanium Black, Titanium Whitesilver, Titanium Gray, Titanium Jadegreen, Titanium Jetblack, Titanium Pinkgold

Models

AZ01GD

BTitanium Silverblue, Titanium Black, Titanium Whitesilver, Titanium Gray, Titanium Jadegreen, Titanium Jetblack, Titanium Pinkgold

Price

About 550 USD

—

Price

AAbout 550 USD

B—

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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