Compare / iPhone 18 Pro Max vs Redmi K90 Ultra

iPhone 18 Pro Max vs Redmi K90 Ultra

A side-by-side comparison of the iPhone 18 Pro Max and the Redmi K90 Ultra, covering display, chipset, memory, camera, battery and build.

Redmi K90 Ultra
Xiaomi
Redmi K90 Ultra

Overview

Display
iPhone 18 Pro Max
6.9inch
LTPO Super Retina XDR OLED · 120 Hz
1320 × 2868 · 460 PPI
Redmi K90 Ultra
6.8inch
AM-OLED · 165 Hz
1280 × 2772 · 447 PPI
Chip
iPhone 18 Pro Max
Apple A20 Pro (2 nm)
Hexa-core (2x4.93 GHz + 4x2.64 GHz)
Apple GPU (7-core graphics) · iOS 27
Redmi K90 Ultra
Qualcomm Snapdragon 8 Elite SM8750-AB (Sun) 3 nm
4.32 GHz octa-core
Qualcomm Adreno 830 (1100 MHz) · Google Android 16 (Baklava)
Memory
iPhone 18 Pro Max
12GB RAM
256 GB · 512 GB · 1 TB · 2 TB storage
No card slot
Redmi K90 Ultra
12 / 16GB RAM
256 GB · 512 GB storage
No card slot
Camera
iPhone 18 Pro Max
48MP Main
48 MP Periscope
48 MP Ultra Wide
18 MP selfie
4K@24/25/30/60/100/120fps video
Redmi K90 Ultra
50.1MP Main
8 MP Ultra Wide
20.2 MP selfie
7680x4320 pixel video
Battery
iPhone 18 Pro Max
5,391mAh
25 W wireless
Redmi K90 Ultra
8,550mAh
100 W wired
Build
iPhone 18 Pro Max
249g
163.4 × 78 × 8.8 mm
IP68
Redmi K90 Ultra
227g
162.91 × 77.93 × 8.18 mm
IP69
Connectivity
iPhone 18 Pro Max
5GWi-Fi 7Bluetooth 6.0NFCNano-SIM + eSIM + eSIM (max 2 at a time; International)USB Type-C 3.2 Gen 2
Redmi K90 Ultra
5GWi-Fi 7Bluetooth 5.4NFCNano-SIM (4FF)USB C reversible USB 2.0

Specifications

iPhone 18 Pro Max

Technology
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands

1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 106 - A3717

1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71 - A3473

1, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71, 106 - A3716

1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 66, 106 - A3718

5G bands

1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 53, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A3717

1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79, 258, 260, 261 SA/NSA/Sub6/mmWave - A3473

1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79 SA/NSA/Sub6 - A3716

1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A3718

Speed
HSPA, LTE, 5G

Redmi K90 Ultra

Technology
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800
3G bands
UMTS 2100 / 1700/2100 / 850 / 800 / 900 / 800 - HSUPA, HSUPA 5.8, HSDPA, HSPA+ 21.1, HSPA+ 42.2, DC-HSDPA 42.2
4G bands
LTE bands 1, 3, 5, 7, 8, 19, 28, 34, 38, 39, 40, 41, 42, 48, 66 - 100/50, 150/50, 300/50, 300/75, 300/100, 450/50, 450/100, 600/50, 600/100
5G bands
NR bands 1, 3, 5, 7, 8, 28, 38, 40, 41, 48, 66, 77, 78 - 1500, 2600, 3700 data links
Dual SIM
SIM2 supports same bands as SIM1

iPhone 18 Pro Max

Announced
2026, September 09
Status
Available. Released 2026, September 18

Redmi K90 Ultra

Announced
2026 Jun
Status
Available. Released 2026 Jun 29

iPhone 18 Pro Max

Dimensions
163.4 x 78 x 8.8 mm (6.43 x 3.07 x 0.35 in)
Weight
249 g (8.78 oz)
Build
Glass front (Ceramic Shield 2), aluminum frame, aluminum back/ glass back (Ceramic Shield)
SIM

· Nano-SIM + eSIM + eSIM (max 2 at a time; International)

· eSIM + eSIM (8 or more, max 2 at a time; USA)

· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time; China)

IP68 dust tight and water resistant (immersible up to 6m for 30 min)

Redmi K90 Ultra

Dimensions
162.91 × 77.93 × 8.18 mm
Weight
227 g
Build
Yes
SIM
Nano-SIM (4FF)
Protection
IP69 dust/water resistant (150 cm, 30 min)
Extras
Haptic touch feedback, Tactile touch feedback

iPhone 18 Pro Max

Type
LTPO Super Retina XDR OLED120HzHDR10Dolby Vision1000 nits (typ)1600 nits (HBM)3000 nits (peak)
Size
6.9 inches, 115.6 cm2 (~90.7% screen-to-body ratio)
Resolution
1320 x 2868 pixels, 19.5:9 ratio (~460 ppi density)
Protection

Ceramic Shield 2

Anti-reflective coating

Redmi K90 Ultra

Type
AM-OLED display, 1073.7M colors, 165 Hz
Size
6.8 inches
Resolution
1280x2772 pixels (~447 PPI density), ~90.2% screen-to-body ratio
Protection
Yes
Touch
Capacitive multi-touch screen
Notch/Hole
1-hole

iPhone 18 Pro Max

OS
iOS 27
Chipset
Apple A20 Pro (2 nm)
CPU
Hexa-core (2x4.93 GHz + 4x2.64 GHz)
GPU
Apple GPU (7-core graphics)

Redmi K90 Ultra

OS
Google Android 16 (Baklava)
Chipset
Qualcomm Snapdragon 8 Elite SM8750-AB (Sun) 3 nm
CPU
4.32 GHz octa-core
GPU
Qualcomm Adreno 830 (1100 MHz)

iPhone 18 Pro Max

Card slot
No
Internal

256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 2TB 12GB RAM

NVMe

Redmi K90 Ultra

Card slot
No
Internal
512GB 16GB RAM, 512GB 12GB RAM, 256GB 16GB RAM, 256GB 12GB RAM
Interface
UFS 4.1

iPhone 18 Pro Max

Triple

48 MP, f/1.5-4.0, 24mm (wide), 1/1.28", 1.22µm, dual pixel PDAF, sensor-shift OIS (gen2)

48 MP, f/2.8, 100mm (periscope telephoto), 1/2.55", 0.7µm, PDAF, 3D sensor‑shift OIS, 4x optical zoom

48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF

TOF 3D LiDAR scanner (depth)

Features
Dual-LED dual-tone flash, HDR (photo/panorama), Cinematic from regular video
Video
4K@24/25/30/60/100/120fps1080p@25/30/60/120/240fps10-bit HDRDolby Vision HDR (up to 120fps)ProResProRes RAW (up to 120fps)Apple Log 23D (spatial) video/audiostereo sound rec.

Redmi K90 Ultra

Dual

50.1 MP, f/1.68, 24mm, 1.0 x optical zoom, BSI CMOS, 1.00µm, PD AF, EIS, EIS (video), OIS, Pixel unification, HDR photo, HDR video, Red-eye reduction, Slow motion video, Burst mode, Refocus, Touch focus, Macro mode, Panorama Photo, Face detection, Face tagging, Smile detection, Face retouch, Face retouch (video), Intelligent scene detection

8.0 MP, f/2.20, 15mm, (ultrawide), BSI CMOS, 1.12µm, HDR photo, HDR video, Slow motion video, Burst mode, Panorama Photo, Face detection, Face tagging, Smile detection, Face retouch, Face retouch (video), Intelligent scene detection

Other features
single LED flash
Video
7680x4320 pixel

iPhone 18 Pro Max

Single

18 MP multi-aspect, f/1.9, 20mm (ultrawide), PDAF

SL 3D, (depth/biometrics sensor)

Features
HDRDolby Vision HDR3D (spatial) audiostereo sound rec.ProRes RAWApple Log 2
Video
4K@24/25/30/60fps, 1080p@25/30/60/120fps, gyro-EIS

Redmi K90 Ultra

Single

20.2 MP, f/2.00, BSI CMOS, Pixel unification, HDR photo, HDR video, Slow motion video, Burst mode, Panorama Photo, Face detection, Face tagging, Smile detection, Face retouch, Face retouch (video), Intelligent scene detection

Video
1920x1080 pixel

iPhone 18 Pro Max

Loudspeaker
Yes, with stereo speakers
3.5mm jack
No

Redmi K90 Ultra

Loudspeaker
3
3.5mm jack
No
Audio features
Voice speakerSpeakerphoneANCHD VoiceVoLTEViLTE

iPhone 18 Pro Max

WLAN
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, hotspot
Bluetooth
6.0, A2DP, LE
Positioning
GPS (L1+L5)GLONASSGALILEOBDSQZSSNavIC
NFC
Yes
Radio
No
USB
USB Type-C 3.2 Gen 2, DisplayPort

Redmi K90 Ultra

WLAN
802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be
Bluetooth
Bluetooth 5.4
Positioning
Simultaneous GPSA-GPSDual-frequency GPSGeotaggingQuickGPSQZSSNavIC
Satellite details
GLONASS (L1OF); Galileo (E1, E5a); BeiDou (B1c, B1I, B2a BeiDou receiver)
NFC
Yes
USB
USB C reversible USB 2.0
USB features
USB chargingUSB fast chargingUSB HostUSB OTG 1.3USB OTG 2.0USB PDUSB PD 2.0USB PD 3.0
Wireless features
Miracast, Wi-Fi Direct, Wi-Fi Tethering, WiDi, Wi-Fi Calling
IR
Yes

iPhone 18 Pro Max

Sensors

Face ID, accelerometer, gyro, proximity, compass, barometer

Ultra Wideband (UWB) support (gen2 chip)

Emergency SOS, Messages and Find My via satellite

Redmi K90 Ultra

Sensors
AccelerometerGyroCompassIn-screen FP sensorL sensorP sensorStep counterNFC
Software
Voice CommandBusiness card recognitionNavigation softwareAugmented Reality (AR)Intelligent personal assistantVoice RecognitionFace Recognition

iPhone 18 Pro Max

Type

Market-dependent versions:

· Li-Ion 5391 mAh - Nano SIM model

· Li-Ion 5567 mAh - eSIM only model

Charging

Wired, PD3.2, AVS, 50% in 15 min

25W wireless MagSafe/Qi2, 50% in 30 min (15W - China)

4.5W reverse wired

Redmi K90 Ultra

Type
8550 mAh battery Li-ion (Si-C)
Charging
100.0 W charging wired

iPhone 18 Pro Max

Colors
Black, Silver, Glacier, Burgundy
Models
A3717, A3473, A3716, A3718
Price
£ 1,299.00 / € 1,599.00

Redmi K90 Ultra

Models
Redmi K90 Ultra 5G Standard Edition Dual SIM TD-LTE CN 512GB M332BF
Price
¥4,199
Market
Asia
Countries
China

iPhone 18 Pro Max

Performance

AnTuTu: 3463072 (v11)

GeekBench: 12794 (v6), 11558 (v7)

3DMark: 7931 (Wild Life Extreme)

Display
969 nits max brightness (measured)
Loudspeaker
-25.0 LUFS (Very good)
Battery
Active use score 19:20h

Redmi K90 Ultra

Not listed for this device

iPhone 18 Pro Max

Energy
Class A
Battery
62:00h endurance, 1000 cycles
Free fall
Class B (180 falls)
Repairability
Class C

Redmi K90 Ultra

Not listed for this device