Redmi A3x 4G vs Samsung Galaxy S25 Ultra – Price, Specs & Features

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Redmi A3x 4G

Unisoc T603
12 nm
5000 mAh
10W
6.71"
720x1650 pixels
8 MP
1080p@30fps
Specs

Samsung Galaxy S25 Ultra

Snapdragon 8 Elite
3 nm
5000 mAh
45W
6.9"
1440 x 3120 pixels
200 MP
8K@24/30fps
Specs

Samsung Galaxy S25 Ultra

General

Launch Date

May 24, 2024

January 22, 2025

Availability

Available Now

Android 14

Android 15

Custom UI

MIUI

One UI 7

OS Updates

2 Years

7 Years

Security Updates

3 Years

7 Years

AI Features

AI Select, Circle to Search, Cross-app Action, Call Transcript, Writing Assist, Drawing Assist, Audio Eraser, Now Brief, Now Bar and More

Body

Dimensions

168.4 x 76.3 x 8.3 mm

162.8 x 77.6 x 8.2 mm

Thickness

8.3 mm

8.2 mm

Weight

193 g

218 g

Back Material

Corning Gorilla Armor

Build Details

Mineral Glass

Titanium Frame (grade 5)

IP Rating

IP68 (dust tight and water resistant (immersible up to 1.5m for 30 min))

Display

Size

6.71 inches

6.9 inches

Type

IPS LCD

Dynamic LTPO AMOLED 2X, HDR10+, Always-on display, DX anti-reflective coating

Refresh Rate

90 Hz

120 Hz

Peak Brightness

500 nits

2600 nits

Resolution

720x1650 pixels

1440 x 3120 pixels

Pixel Density

268 ppi

498 ppi

Aspect Ratio

20.5:9

19.5:9

Screen to Body Ratio

82.9 %

92.5 %

Protection

Gorilla Glass 3

Corning Gorilla Armor

Performance

Chipset¹

Unisoc Unisoc T603

Qualcomm Snapdragon 8 Elite

Process Size

12 nm

3 nm

CPU

Octa core
1.8 GHz, Dual core, Cortex A75
1.6 GHz, Hexa Core, Cortex A55

Octa-core
2x4.47 GHz Oryon V2 Phoenix L
6x3.53 GHz Oryon V2 Phoenix M

GPU

Mali-G57

Adreno 830

RAM & Storage

3GB 64GB (eMMC 5.1)
4GB 128GB (eMMC 5.1)

12GB 256GB (UFS 4.0)
12GB 512GB (UFS 4.0)
12GB 1024GB (UFS 4.0)

RAM Type

LPDDR4X

LPDDR5X

Expandable Memory

Yes

Camera

Main Camera

8 MP
f/2.0, (wide)

0.08 MP
(auxiliary lens)

200 MP
f/1.7, 24mm (wide), 1/1.3", 0.6µm, multi-directional PDAF, OIS

10 MP
f/2.4, 67mm (telephoto), 1/3.52", 1.12µm, PDAF, OIS, 3x optical zoom

50 MP
f/3.4, 111mm (periscope telephoto), 1/2.52", 0.7µm, PDAF, OIS, 5x optical zoom

50 MP
f/1.9, 120˚ (ultrawide), 0.7µm, dual pixel PDAF, Super Steady video

OIS

Yes

Features

LED flash, HDR, Digital Zoom

Laser AF, Best Face, LED flash, auto-HDR, panorama

Video Recording

1080p@30fps

8K@24/30fps
4K@30/60/120fps
1080p@30/60/240fps

Video Recording Features

10-bit HDR, HDR10+, Stereo Sound recording, gyro-EIS

Selfie Camera

5 MP
f/2.2, (wide)

12 MP
f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF

Selfie Features

HDR

HDR, HDR10+

Selfie Video Recording

1080p@30fps

4K@30/60fps
1080p@30fps

Connectivity

SIM

Dual SIM, GSM+GSM
SIM1: Nano, SIM2: Nano

Dual SIM, GSM+GSM
SIM1: Nano, SIM2: eSIM

SIM 1

No 5G Support (Supports 4G Only)

17 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28, N66
TDD: N38, N40, N41, N77, N78

SIM 2

No 5G Support (Supports 4G Only)

17 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28, N66
TDD: N38, N40, N41, N77, N78

VoLTE

Yes

Wi-Fi

Wi-Fi 4

Wi-Fi 7

Wi-Fi Details

802.11 b/g/n

802.11 a/b/g/n/ac/be/ax 5GHz 6GHz, MIMO

Wi-Fi Features

Mobile Hotspot

Wi-Fi Direct, Mobile Hotspot

USB

USB Type-C

USB Type-C 3.2, DisplayPort 1.2, OTG

Bluetooth

4.2

5.4

NFC

Yes

GPS

Yes with Glonass

Yes with A-GPS, Glonass

Infrared

Yes

UWB (Ultra Wideband)

Yes

Battery

Capacity

5000 mAh

Type

Li-Polymer

Li-Ion

Removable

Wired charging

10W

45W

Charging Speed

65% in 30 min

Wireless Charging

15W

Reverse Wireless Charging

4.5W

Charger in the Box

Yes

Sound

Stereo Speakers

Yes

3.5mm Headphone Jack

Yes

FM Radio

Yes

Extra Features

Sensors

Fingerprint (side-mounted), accelerometer, compass

Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer

Others

Virtual proximity sensing

Samsung DeX, Samsung Wireless DeX

Colors and Pricing

Colors

Midnight Black, Moonlight White, Aurora Green

Titanium Silver Blue, Titanium Black, Titanium Gray, Titanium White Silver, Titanium Jet Black, Titanium Jade Green, Titanium Pink Gold

Price in India

₹6140

₹109499

FAQs

Which phone has better performance?

In this performance comparison, the Samsung Galaxy S25 Ultra with its Qualcomm Snapdragon 8 Elite (3nm) performs better than the Redmi A3x 4G with the Unisoc Unisoc T603 (12nm), thanks to superior chipset efficiency.

Which phone offers longer software support?

Samsung Galaxy S25 Ultra offers 7 years of OS updates, whereas Redmi A3x 4G provides 2 years. For security updates, Samsung Galaxy S25 Ultra offers 7 years of support compared to Redmi A3x 4G's 3 years.

Which phone has a better display?

Samsung Galaxy S25 Ultra features a superior AMOLED display, while Redmi A3x 4G comes with an LCD panel. In terms of smoothness, Samsung Galaxy S25 Ultra offers a higher 120 Hz refresh rate, ensuring fluid scrolling and animations. Samsung Galaxy S25 Ultra also boasts a brighter screen with 2600 nits of peak brightness, enhancing outdoor visibility. Notably, Samsung Galaxy S25 Ultra offers a higher screen resolution, resulting in sharper visuals and more detailed content.

Which phone has a bigger battery and faster charging?

Both phones are equipped with the same 5000 mAh battery capacity. Samsung Galaxy S25 Ultra also supports faster wired charging at 45W, compared to 10W on Redmi A3x 4G. Samsung Galaxy S25 Ultra supports wireless charging at 15W, while Redmi A3x 4G lacks this feature.

Which phone has better water and dust resistance?

Samsung Galaxy S25 Ultra includes an IP68 rating, while Redmi A3x 4G lacks an official IP rating.

Can I buy these phones on Amazon?

Redmi A3x 4G – Check price here
Samsung Galaxy S25 Ultra – Check price here

¹ Scores can vary even with the same chipset due to RAM, thermals, and software optimization.