Screen size
15 Ultra6.7"
Redmi K90 MaxWinner: 6.8"+1.5%
Quick verdict
15 Ultra leads the measured specs 8-7.
Measured wins
15 Ultra
8
spec wins
Overall winner
Ties
8
equal specs
Redmi K90 Max
7
spec wins
Screen size
Technology
15 Ultra
GSM / HSPA / LTE / 5G
Redmi K90 Max
GSM / HSPA / LTE / 5G
2G bands
15 Ultra
GSM 850 / 900 / 1800 / 1900
Redmi K90 Max
GSM 850 / 900 / 1800 / 1900
3G bands
15 Ultra
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
Redmi K90 Max
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
15 Ultra
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, 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66 - China
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
equal specsRedmi K90 Max
1, 3, 4, 5, 7, 8, 19, 28, 34, 38, 39, 40, 41, 42, 43, 48, 66
5G bands
15 Ultra
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International, 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
Redmi K90 Max
1, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41, 48, 77, 78 SA/NSA
Speed
15 Ultra
HSPA, LTE, 5G
Redmi K90 Max
HSPA, LTE, 5G
Announced
15 Ultra
2025, February 27
Redmi K90 Max
2026, April 21
Status
15 Ultra
Available. Released 2025, February 27
Redmi K90 Max
Available. Released 2026, April 21
Dimensions
15 Ultra
161.3 x 75.3 x 9.4 mm (6.35 x 2.96 x 0.37 in)
Redmi K90 Max
162.9 x 77.9 x 8.2 mm (6.41 x 3.07 x 0.32 in)
Weight
15 Ultra
226 g or 229 g (7.97 oz)
Redmi K90 Max
227 g (8.01 oz)
Build
15 Ultra
Glass front, fiber-reinforced plastic back or silicone polymer back (eco leather), aluminum frame
Redmi K90 Max
Glass front (Dragon Crystal Glass), aluminum frame, glass-fiber reinforced plastic back or silicone polymer back
SIM
15 Ultra
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
Redmi K90 Max
Nano-SIM + Nano-SIM
Other
15 Ultra
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Aerospace-grade glass fiber
Redmi K90 Max
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Built-in cooling fan
Type
15 Ultra
LTPO AMOLED, 68B colors, 120Hz, 1920Hz PWM, Dolby Vision, HDR10+, HDR Vivid, 3200 nits (peak)
Redmi K90 Max
AMOLED, 68B colors, 165Hz, Dolby Vision, HDR10+, HDR Vivid, 3500 nits (peak)
Size
15 Ultra
6.73 inches, 108.9 cm2 (~89.7% screen-to-body ratio)
Redmi K90 Max
6.83 inches, 114.5 cm2 (~90.3% screen-to-body ratio)
Resolution
15 Ultra
1440 x 3200 pixels, 20:9 ratio (~522 ppi density)
Redmi K90 Max
1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density)
Protection
15 Ultra
Xiaomi Shield Glass 2.0, Mohs level 6
Redmi K90 Max
Dragon Crystal Glass
OS
15 Ultra
Android 15, up to 4 major Android upgrades, HyperOS 3
Redmi K90 Max
Android 16, HyperOS 3
Chipset
15 Ultra
Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm)
Redmi K90 Max
MediaTek Dimensity 9500 (3 nm)
CPU
15 Ultra
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
Redmi K90 Max
Octa-core (1x4.21 GHz C1-Ultra & 3x3.5 GHz C1-Premium & 4x2.7 GHz C1-Pro)
GPU
15 Ultra
Adreno 830
Redmi K90 Max
Mali-G1 Ultra MC12
Card slot
15 Ultra
No
Redmi K90 Max
No
Internal
15 Ultra
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Redmi K90 Max
256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Other
15 Ultra
UFS 4.1
Redmi K90 Max
UFS 4.1
Quad
15 Ultra
50 MP, f/1.6, 23mm (wide), 1.0"-type, 1.6µm, dual pixel PDAF, OIS 50 MP, f/1.8, 70mm (telephoto), 1/2.51", 0.7µm, dual pixel PDAF (10cm - ∞), OIS, 3x optical zoom 200 MP, f/2.6, 100mm (periscope telephoto), 1/1.4", 0.56µm, multi-directional PDAF, OIS, 4.3x optical zoom 50 MP, f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm, dual pixel PDAF TOF 3D, (depth)
Redmi K90 Max
-
Features
15 Ultra
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Redmi K90 Max
LED flash, HDR, panorama
Video
15 Ultra
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)
Redmi K90 Max
8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS
Dual
15 Ultra
-
Redmi K90 Max
50 MP, f/1.7, 24mm (wide), 1/1.55", 1.0µm, PDAF, OIS 8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm
Single
15 Ultra
32 MP, f/2.0, 21mm (wide), 1/3.14", 0.7µm
Redmi K90 Max
20 MP (wide)
Features
15 Ultra
HDR, panorama
Redmi K90 Max
HDR
Video
15 Ultra
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Redmi K90 Max
1080p@30/60fps
Loudspeaker
15 Ultra
Yes, with stereo speakers
Redmi K90 Max
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
15 Ultra
No
Redmi K90 Max
No
Other
15 Ultra
24-bit/192kHz Hi-Res & Hi-Res Wireless audio Qualcomm XPAN (24-bit/96kHz audio)
Redmi K90 Max
Tuned by Bose Bose 2.1 stereo sound system with a woofer 24-bit/192kHz Hi-Res & Hi-Res wireless audio
WLAN
15 Ultra
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Redmi K90 Max
Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi Direct
Bluetooth
15 Ultra
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Redmi K90 Max
5.4, A2DP, LE, LHDC 5, Auracast, ASHA, MIHC
Positioning
15 Ultra
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
Redmi K90 Max
GPS (L1+L5), BDS (B1I+B1c+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), GLONASS, NavIC
NFC
15 Ultra
Yes
Redmi K90 Max
Yes
Infrared port
15 Ultra
Yes
Redmi K90 Max
Yes
Radio
15 Ultra
No
Redmi K90 Max
No
USB
15 Ultra
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Redmi K90 Max
USB Type-C
Sensors
15 Ultra
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
Redmi K90 Max
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass
Other
15 Ultra
Two-way satellite communication
Redmi K90 Max
-
Type
15 Ultra
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Redmi K90 Max
8550 mAh
Charging
15 Ultra
90W wired, PD3.0, QC3+ 80W wireless 10W reverse wireless
Redmi K90 Max
100W wired, 100W PPS, PD3.0 22.5W reverse wired
Colors
15 Ultra
Black, White, Silver Chrome, Green
Redmi K90 Max
Silver, Blue, Black
Models
15 Ultra
25010PN30G
Redmi K90 Max
-
SAR EU
15 Ultra
1.00 W/kg (head) 1.00 W/kg (body)
Redmi K90 Max
-
Price
15 Ultra
$ 1,468.84 / £ 929.00 / € 1,049.00
Redmi K90 Max
About 440 EUR