OnePlus 15 vs Samsung Galaxy S21 FE 5G
The OnePlus 15 scores 9.4 in our rating, and the Samsung Galaxy S21 FE 5G scores 6.8. The OnePlus 15 leads in display, performance, camera, battery, design, software support and value for money. At launch in the US, the Samsung Galaxy S21 FE 5G cost $200 less ($699.99 vs $899.99). The OnePlus 15 is the newer phone, announced Oct 27, 2025.
Key differences
Why choose the OnePlus 15
- Bigger battery 7,300 mAh vs 4,500 mAh
- Silicon-carbon battery
- Faster wired charging 120 W vs 25 W
- Bigger screen 6.78 inches vs 6.4 inches
- Longer optical zoom 3.5× vs 3×
- Higher refresh rate 165 Hz vs 120 Hz
Why choose the Samsung Galaxy S21 FE 5G
- Lower launch price $699.99 vs $899.99
- Lighter 177 g vs 211 g
- Thinner 7.9 mm vs 8.1 mm
- Reverse wireless charging
PhoneRanked scores
Calculated from specs, relative to phones from the same year and price range. How we rate phones
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Overall
9.4
6.8
Display
8.9
8.2
Performance
9.0
5.2
Camera
8.4
7.3
Battery
8.5
5.0
Design
8.8
8.2
Software support
7.4
6.9
Value for money
7.6
3.9
Display
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Size
6.78 inches
6.4 inches
Type
OLED
OLED, Dynamic AMOLED 2X
Resolution
1272 × 2772 px
1080 × 2340 px
Pixel density
450 ppi
403 ppi
Refresh rate
165 Hz
120 Hz
Adaptive refresh
✓ Yes
✕ No
HDR
HDR10+, HDR Vivid
—
Protection
Gorilla Glass Victus 2
Gorilla Glass Victus
Performance
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Process
3 nm
5 nm
Max CPU clock
4.61 GHz
2.84 GHz
GPU
Adreno 840
Adreno 660
Geekbench 6 single-core
—
1,200
Geekbench 6 multi-core
—
3,450
RAM
12 GB / 16 GB
6 GB / 8 GB
Storage
256 GB / 512 GB
128 GB / 256 GB
Storage type
UFS 4.1
UFS 3.1
microSD slot
✕ No
✕ No
Cameras
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Main camera
50 MP, f/1.8
12 MP, f/1.8, 1/1.76"
Optical stabilization
✓ Yes
✓ Yes
Ultrawide
50 MP
12 MP
Telephoto
50 MP, 3.5× optical
8 MP, 3× optical
Optical zoom
3.5×
3×
Rear cameras
3
3
Rear video
8K@30
4K@60
Front camera
32 MP
32 MP
Front video
4K@60
4K@60
Battery and charging
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Capacity
7,300 mAh
4,500 mAh
Battery type
Silicon-carbon
Li-Ion
Wired charging
120 W
25 W
Wireless charging
50 W
15 W
Reverse wireless
✕ No
✓ Yes
Charger in box
✓ Yes
✕ No
Design and build
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Dimensions
161.42 × 76.67 × 8.1 mm
155.7 × 74.5 × 7.9 mm
Thickness
8.1 mm
7.9 mm
Weight
211 g
177 g
Form factor
Bar
Bar
Frame
—
Aluminum
Back
Fiberglass
Plastic
Water resistance
IP68 + IP69K
IP68
Fingerprint
Under-display ultrasonic
Under-display optical
3D face unlock
✕ No
✕ No
SIM
Dual Nano-SIM + eSIM
—
Colors
Sand Storm, Infinite Black, Ultra Violet
Olive, Lavender, White, Graphite, Navy
Connectivity and features
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
5G
✓ Yes
✓ Yes
Wi-Fi
Wi-Fi 7
Wi-Fi 6
Bluetooth
6.0
5.0
USB
USB-C 3.x
USB-C 3.x
NFC
✓ Yes
✓ Yes
3.5 mm jack
✕ No
✕ No
Stereo speakers
✓ Yes
✓ Yes
Satellite
✕ No
✕ No
IR blaster
✓ Yes
✕ No
Software
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
OS at launch
Android 16
Android 12
Interface
OxygenOS 16
One UI 4
OS updates
4 years
4 years
Security updates
6 years
5 years
Launch and price
Spec
OnePlus 15Samsung Galaxy S21 FE 5G
Announced
Oct 27, 2025
Jan 4, 2022
Released
—
Jan 11, 2022
Status
Released
Discontinued
US launch price
$899.99
$699.99
Green marks the stronger value in a row. Specs come from official manufacturer data, cross-checked with established tech media; each phone page lists its sources. Report an error
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