Screen size
Mix Fold 4Winner: 8.0"+15%
Redmi Note 15 Special6.8"
Quick verdict
Mix Fold 4 leads the measured specs 12-6.
Measured wins
Mix Fold 4
12
spec wins
Overall winner
Ties
5
equal specs
Redmi Note 15 Special
6
spec wins
Screen size
Technology
Mix Fold 4
GSM / CDMA / HSPA / EVDO / LTE / 5G
Redmi Note 15 Special
GSM / HSPA / LTE / 5G
2G bands
Mix Fold 4
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
Redmi Note 15 Special
GSM 850 / 900 / 1800 / 1900
3G bands
Mix Fold 4
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
Redmi Note 15 Special
HSDPA 850 / 900 / 2100
4G bands
Mix Fold 4
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
Stereo speakers
equal specs1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66
Redmi Note 15 Special
1, 3, 5, 8, 28, 40, 41
5G bands
Mix Fold 4
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79 SA/NSA
Redmi Note 15 Special
1, 3, 5, 8, 28, 40, 78 SA/NSA
Speed
Mix Fold 4
HSPA, LTE, 5G
Redmi Note 15 Special
HSPA, LTE, 5G
Announced
Mix Fold 4
2024, July 19
Redmi Note 15 Special
2026, April 02
Status
Mix Fold 4
Available. Released 2024, July 19
Redmi Note 15 Special
Released Apr 7, 2026
Dimensions
Mix Fold 4
Unfolded: 159.4 x 143.3 x 4.6 mm Folded: 159.4 x 73.1 x 9.5 mm
Redmi Note 15 Special
164.0 x 75.4 x 7.4 mm or 7.8 mm
Weight
Mix Fold 4
226 g or 228 g (7.97 oz)
Redmi Note 15 Special
178 g or 182 g (6.28 oz)
Build
Mix Fold 4
Glass front (folded), plastic front (unfolded), aluminum frame
Redmi Note 15 Special
-
SIM
Mix Fold 4
Nano-SIM + Nano-SIM
Redmi Note 15 Special
Nano-SIM + Nano-SIM
Other
Mix Fold 4
IPX8 water resistant (immersible up to 1.5m for 30 min)
Redmi Note 15 Special
Drop resistant up to 1.7m MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions IP66 dust tight and water resistant (high pressure water jets)
Type
Mix Fold 4
Foldable LTPO AMOLED, 1B colors, 120Hz, HDR10+, Dolby Vision, 1700 nits (HBM), 3000 nits (peak)
Redmi Note 15 Special
AMOLED, 68B colors, 120Hz, 3840Hz PWM, 800 nits (typ), 3200 nits (peak)
Size
Mix Fold 4
7.98 inches, 204.1 cm2 (~89.4% screen-to-body ratio)
Redmi Note 15 Special
6.77 inches, 110.9 cm2 (~89.7% screen-to-body ratio)
Resolution
Mix Fold 4
2224 x 2488 pixels (~418 ppi density)
Redmi Note 15 Special
1080 x 2392 pixels (~388 ppi density)
Other
Mix Fold 4
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
Redmi Note 15 Special
-
OS
Mix Fold 4
Android 14, HyperOS
Redmi Note 15 Special
Android 15, up to 4 major Android upgrades, HyperOS 2
Chipset
Mix Fold 4
Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
Redmi Note 15 Special
Qualcomm SM6475-AB Snapdragon 6 Gen 3 (4 nm)
CPU
Mix Fold 4
Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
Redmi Note 15 Special
Octa-core (4x2.4 GHz Cortex-A78 & 4x1.8 GHz Cortex-A55)
GPU
Mix Fold 4
Adreno 750
Redmi Note 15 Special
Adreno 710
Card slot
Mix Fold 4
No
Redmi Note 15 Special
microSDXC (uses shared SIM slot)
Internal
Mix Fold 4
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Redmi Note 15 Special
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Other
Mix Fold 4
UFS 4.0
Redmi Note 15 Special
UFS 2.2
Quad
Mix Fold 4
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)
Redmi Note 15 Special
-
Features
Mix Fold 4
Laser AF, color spectrum sensor, LED flash, HDR, panorama, Leica lenses
Redmi Note 15 Special
LED flash, HDR, panorama
Video
Mix Fold 4
8K@24fps, 4K@24/30/60fps, 1080p@30/60/120/240/960fps, 720p@1920fps, Dolby Vision HDR
Redmi Note 15 Special
4K@30fps, 1080p@30fps, gyro-EIS
Dual
Mix Fold 4
-
Redmi Note 15 Special
50 MP, f/1.8, (wide), 1/2.88", 0.61µm, PDAF Auxiliary lens
Single
Mix Fold 4
16 MP, (wide) Cover camera: 16 MP, (wide)
Redmi Note 15 Special
20 MP, f/2.2, (wide), 1/4"
Features
Mix Fold 4
Dolby Vision HDR
Redmi Note 15 Special
-
Video
Mix Fold 4
1080p@30/60fps
Redmi Note 15 Special
1080p@30fps
Loudspeaker
Mix Fold 4
Yes, with stereo speakers
Redmi Note 15 Special
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
Mix Fold 4
No
Redmi Note 15 Special
No
Other
Mix Fold 4
24-bit/192kHz Hi-Res & Hi-Res Wireless audio Snapdragon Sound
Redmi Note 15 Special
24-bit/192kHz Hi-Res audio
WLAN
Mix Fold 4
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band (tri-band after future SW update), Wi-Fi Direct
Redmi Note 15 Special
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
Mix Fold 4
5.4, A2DP, LE, aptX HD, aptX Adaptive, LHDC
Redmi Note 15 Special
5.1, A2DP, LE
Positioning
Mix Fold 4
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
Redmi Note 15 Special
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
Mix Fold 4
Yes
Redmi Note 15 Special
No
Infrared port
Mix Fold 4
Yes
Redmi Note 15 Special
Yes
Radio
Mix Fold 4
No
Redmi Note 15 Special
No
USB
Mix Fold 4
USB Type-C 3.2, OTG
Redmi Note 15 Special
USB Type-C 2.0, OTG
Sensors
Mix Fold 4
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Redmi Note 15 Special
Fingerprint (under display, optical), accelerometer, gyro, compass
Other
Mix Fold 4
Two-way satellite communication (calls, messages)
Redmi Note 15 Special
Virtual proximity sensing
Type
Mix Fold 4
5100 mAh
Redmi Note 15 Special
Li-Ion 5800 mAh
Charging
Mix Fold 4
67W wired, PD3.0, QC4, 31% in 10 min 50W wireless, 24% in 10 min
Redmi Note 15 Special
45W wired 18W reverse wired
Colors
Mix Fold 4
Black, White, Blue
Redmi Note 15 Special
Crimson Reserve red, Carbon Black, Frosted White
Price
Mix Fold 4
About 1140 EUR
Redmi Note 15 Special
About 190 EUR