Samsung Galaxy S21 FE vs Xiaomi 15 Ultra

Compare Samsung Galaxy S21 FE and Xiaomi 15 Ultra side by side. Check specs, features, camera, battery, and performance to see which is better.

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Samsung Galaxy S21 FE alternatives

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Samsung Galaxy S21 FE

Snapdragon 888
5 nm
4500 mAh
25W
6.4"
1080 x 2340 pixels
12 MP
4K@30/60fps
Specs

Xiaomi 15 Ultra

Snapdragon 8 Elite
3 nm
5410 mAh
90W
6.73"
1440 x 3200 pixels
50 MP
8K@30fps
Specs

Samsung Galaxy S21 FE Comparison & Specs

Xiaomi 15 Ultra

General

Launch Date

January 04, 2022

March 11, 2025

Availability

Available Now

Android 12

Android 15

Custom UI

One UI 4

HyperOS 2

OS Updates

4 Years

Security Updates

5 Years

6 Years

AI Features

HyperAI, AI Write, AI Summary and more

Body

Dimensions

155.7 x 74.5 x 7.9 mm

161.3 x 75.3 x 9.4 mm

Thickness

7.9 mm

9.4 mm

Weight

177 g

226 g

Build Details

Plastic Back, Aluminum Frame

Glass-fiber Back Or Vegan Leather, Aluminum Frame

IP Rating

IP68 (up to 1.5m for 30 min)

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

Display

Size

6.4 inches

6.73 inches

Type

Dynamic AMOLED 2X, HDR10, Always-on display

LTPO AMOLED, 68B colors, Dolby Vision, HDR10+, HDR Vivid

Refresh Rate

120 Hz

Peak Brightness

1200 nits

3200 nits

Resolution

1080 x 2340 pixels

1440 x 3200 pixels

Pixel Density

403 ppi

522 ppi

Aspect Ratio

19.5:9

20:9

Screen to Body Ratio

86.7 %

89.7 %

Protection

Gorilla Glass Victus

Performance

Comparison 1

Compare Version 1

With Version 1

Chipset¹

Qualcomm Snapdragon 888

Qualcomm Snapdragon 8 Elite

Process Size

5 nm

3 nm

CPU

Octa-core
1x2.84 GHz Cortex-X1
3x2.42 GHz Cortex-A78
4x1.80 GHz Cortex-A55

Octa-core
2x4.32 GHz Oryon V2 Phoenix L
6x3.53 GHz Oryon V2 Phoenix M

GPU

Adreno 660

Adreno 830

RAM & Storage

8GB 128GB (UFS 3.1)
8GB 256GB (UFS 3.1)

12GB 256GB (UFS 4.1)
16GB 512GB (UFS 4.1)
16GB 1024GB (UFS 4.1)

RAM Type

LPDDR5

LPDDR5X

Expandable Memory

Comparison 2

Compare Version 2

With Version 2

Chipset¹

Exynos 2100

Process Size

5 nm

CPU

Octa-core
1x2.9 GHz Cortex-X1
3x2.80 GHz Cortex-A78
4x2.2 GHz Cortex-A55

GPU

Mali-G78 MP14

RAM & Storage

8GB 128GB (UFS 3.1)
8GB 256GB (UFS 3.1)

RAM Type

LPDDR5

Expandable Memory

Camera

Main Camera

12 MP
f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS

8 MP
f/2.4, 76mm (telephoto), 1/4.5", 1.0µm, PDAF, OIS, 3x optical zoom

12 MP
f/2.2, 13mm, 123˚ (ultrawide), 1/3.0", 1.12µm

50 MP
f/1.6, 23mm (wide), 1.0"-type, 1.6µm, Sony LYT-900, dual pixel PDAF, OIS

50 MP
f/1.8, 70mm (telephoto), 1/2.51", 0.7µm, Sony IMX858, dual pixel PDAF (10cm - ∞), OIS, 3x optical zoom

200 MP
f/2.6, 100mm (periscope telephoto), 1/1.4", 0.56µm, Samsung S5KHP9, multi-directional PDAF, OIS, 4.3x optical zoom

50 MP
f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm, Samsung S5KJN5, dual pixel PDAF
TOF 3D, (depth)

OIS

Yes

Features

LED flash, auto-HDR, panorama, Auto Flash, Face detection, Touch to focus

Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)

Video Recording

4K@30/60fps
1080p@30/60/240fps
720p@960fps

8K@30fps
4K@30/60/120fps
1080p@30/60/120/240/480/960/1920fps

Video Recording Features

Slo-motion, HDR10+, gyro-EIS

gyro-EIS, Dolby Vision HDR 10-bit recording (4K@60fps, 1080p)

Selfie Camera

32 MP
f/2.2, 26mm (wide), 1/2.74", 0.8µm

32 MP
f/2.0, 21mm (wide), 1/3.14", 0.7µm, OmniVision OV32B40

Selfie Features

HDR

HDR, panorama

Selfie Video Recording

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

Connectivity

SIM

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

Dual SIM
SIM1: Nano, SIM2: Nano

SIM 1

12 5G Bands

FDD: N1, N3, N5, N7, N8, N20, N28, N66
TDD: N38, N40, N41, N78

21 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28
TDD: N38, N40, N41, N48, N66, N71, N75, N77, N78, N79

SIM 2

12 5G Bands

FDD: N1, N3, N5, N7, N8, N20, N28, N66
TDD: N38, N40, N41, N78

21 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28
TDD: N38, N40, N41, N48, N66, N71, N75, N77, N78, N79

VoLTE

Yes

Wi-Fi

Wi-Fi 6

Wi-Fi 7

Wi-Fi Details

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

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

Wi-Fi Features

Wi-Fi Direct, Mobile Hotspot

Mobile Hotspot

USB

USB Type-C, OTG

USB Type-C 3.2 Gen 2, DisplayPort, OTG

Bluetooth

5.0

6.0

NFC

Yes

GPS

Yes with A-GPS, Glonass

Infrared

Yes

UWB (Ultra Wideband)

Battery

Capacity

4500 mAh

5410 mAh

Type

Li-ion

Si/C Li-Ion

Removable

Wired charging

25W

90W

Charging Speed

50% in 30 min

Wireless Charging

15W

80W

Reverse Wireless Charging

10W

Charger in the Box

Yes

Sound

Stereo Speakers

Yes

3.5mm Headphone Jack

FM Radio

Extra Features

Sensors

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

Under-display ultrasonic fingerprint sensor, accelerometer, gyroscope, proximity, compass, barometer

Others

Samsung DeX

Two-way satellite communication

Colors and Pricing

Colors

White, Graphite, Lavender, Olive

Chrome Silver

Price in India

₹27999

₹109999

FAQs

Which phone has better performance?

In this performance comparison, the Xiaomi 15 Ultra with its Qualcomm Snapdragon 8 Elite (3nm) performs better than the Samsung Galaxy S21 FE with the Qualcomm Snapdragon 888 (5nm), thanks to superior chipset efficiency.

Which phone offers longer software support?

Both phones offer the same 4 years of OS update support. For security updates, Xiaomi 15 Ultra offers 6 years of support compared to Samsung Galaxy S21 FE's 5 years.

Which phone has a better display?

Both Samsung Galaxy S21 FE and Xiaomi 15 Ultra feature AMOLED displays, offering vibrant colors and deeper blacks. Both smartphones offer the same 120 Hz refresh rate. Xiaomi 15 Ultra also boasts a brighter screen with 3200 nits of peak brightness, enhancing outdoor visibility. Notably, Xiaomi 15 Ultra offers a higher screen resolution, resulting in sharper visuals and more detailed content.

Which phone has a bigger battery and faster charging?

Xiaomi 15 Ultra features a larger 5410 mAh battery, potentially delivering better battery life. Xiaomi 15 Ultra also supports faster wired charging at 90W, compared to 25W on Samsung Galaxy S21 FE. Xiaomi 15 Ultra supports faster wireless charging at 80W, compared to 15W on Samsung Galaxy S21 FE.

Which phone has better water and dust resistance?

Both phones feature the same IP68 rating for water and dust resistance.

Can I buy these phones on Amazon?

Samsung Galaxy S21 FE – Check price here
Xiaomi 15 Ultra – Check price here

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