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Our Verdict
Analysis
Xiaomi Mix Fold 4 has the bigger display.
Overall Winner
Xiaomi Mix Fold 4
Display Winner
Xiaomi Mix Fold 4
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie
Specifications Comparison
| Feature | Xiaomi Mix Fold 4 | Xiaomi 15 Ultra |
|---|---|---|
| Display size (in) | 7.98 | 6.73 |
| Charging (W) | 67 | 90 |
| Selfie (MP) | 16.00 | 32.00 |
| Thickness (mm) | 4.60 | 9.35 |
| Chipset | Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm) | Snapdragon 8 Elite |
| OS | Android 14, HyperOS | Android 15, HyperOS 2 |
Pros & Cons
Xiaomi Mix Fold 4
Xiaomi 15 Ultra
- Outstanding camera versatility
- Fast wired and wireless charging
- Bright display
- Heavy
- Software still polishing animations
- Limited availability in some regions
Every Spec, Side by Side
Specification
Xiaomi
Xiaomi Mix Fold 4
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
5100 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
67W wired, PD3.0, QC4, 31% in 10 min
50W wireless, 24% in 10 min
90W wired, 80W wireless
Capacity
—
5410 mAh
Body 5 specs
Dimensions
Unfolded: 159.4 x 143.3 x 4.6 mm Folded: 159.4 x 73.1 x 9.5 mm
161.3 x 75.3 x 9.35 mm
Weight
226 g or 228 g (7.97 oz)
226 g
Build
Glass front (folded), plastic front (unfolded), aluminum frame
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
SIM
Nano-SIM + Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
IPX8 water resistant (immersible up to 1.5m for 30 min)
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Aerospace-grade glass fiber
Connectivity 8 specs
WLAN
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band (tri-band after future SW update), Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
5.4, A2DP, LE, aptX HD, aptX Adaptive, LHDC
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
Yes
Yes
Infrared port
Yes
Yes
Radio
No
No
USB
USB Type-C 3.2, OTG
USB Type-C 3.2 Gen 2, DisplayPort, OTG
5G
—
Yes
Display 5 specs
Type
Foldable LTPO AMOLED, 1B colors, 120Hz, HDR10+, Dolby Vision, 1700 nits (HBM), 3000 nits (peak)
LTPO AMOLED
Size
7.98 inches, 204.1 cm2 (~89.4% screen-to-body ratio)
6.73 inches
Resolution
2224 x 2488 pixels (~418 ppi density)
1440 x 3200 pixels
Cover display:
LTPO AMOLED, 68B colors, 120Hz, HDR10+, Dolby Vision, 1700 nits (HBM), 3000 nits (peak)
6.56 inches, 1080 x 2520 pixels, 21:9 ratio
Scratch/drop-resistant glass
—
Protection
—
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
Two-way satellite communication (calls, messages)
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2024, July 19
2025, February 27
Status
Available. Released 2024, July 19
Available. Released 2025, February 27
Main Camera 3 specs
Quad
50 MP, f/1.7, 23mm (wide), 1/1.49", 1.0µm, PDAF, OIS
50 MP, f/2.0, 47mm (telephoto), PDAF (9cm - ∞), OIS, 2x optical zoom
10 MP, f/2.9, 115mm (periscope telephoto), PDAF (30cm - ∞), OIS, 5x optical zoom
12 MP, f/2.2, 15mm, 120˚ (ultrawide)
50 MP + 50 MP + 200 MP + 50 MP
Features
Laser AF, color spectrum sensor, LED flash, HDR, panorama, Leica lenses
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
8K@24fps, 4K@24/30/60fps, 1080p@30/60/120/240/960fps, 720p@1920fps, Dolby Vision HDR
8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)
Memory 5 specs
Card slot
No
No
Internal
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
UFS 4.0
UFS 4.1
RAM
—
16GB
Storage
—
512GB
Misc 4 specs
Colors
Black, White, Blue
Black, White, Silver Chrome, Green
Price
About 1140 EUR
$ 693.75 / £ 1,295.00 / € 812.34
Models
—
25010PN30G
SAR EU
—
1.00 W/kg (head) 1.00 W/kg (body)
Network 7 specs
Technology
GSM / CDMA / HSPA / EVDO / LTE / 5G
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
CDMA2000 1xEV-DO
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China
3G bands
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International
5G bands
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79 SA/NSA
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Speed
HSPA, LTE, 5G
HSPA, LTE, 5G
Platform 4 specs
OS
Android 14, HyperOS
Android 15, HyperOS 2
Chipset
Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
Snapdragon 8 Elite
CPU
Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Adreno 750
Adreno 830
Selfie Camera 3 specs
Single
16 MP, (wide)
Cover camera:
16 MP, (wide)
32 MP
Features
Dolby Vision HDR
HDR, panorama
Video
1080p@30/60fps
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound 3 specs
Loudspeaker
Yes, with stereo speakers
Yes, with stereo speakers
3.5mm jack
No
No
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Snapdragon Sound
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Qualcomm XPAN (24-bit/96kHz audio)
Eu Label 4 specs
Energy
—
Class A
Battery
—
58:58h endurance, 1000 cycles
Free fall
—
Class C (90 falls)
Repairability
—
Class C
Our Tests 2 specs
Loudspeaker
—
-24.1 LUFS (Very good)
Battery
—
Active use score 16:13h
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Common Questions
Which phone is the best in this comparison?
Xiaomi Mix Fold 4 has the bigger display.
How are the comparison winners decided?
We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".
Which is more affordable?
The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.