Compare / Redmi K90 Ultra vs iPhone Duo
Redmi K90 Ultra vs iPhone Duo
A side-by-side comparison of the Redmi K90 Ultra and the iPhone Duo, covering display, chipset, memory, camera, battery and build.
Overview
Specifications
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 Duo
- 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, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71, 106 - A3447, A3719
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 - A3720
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 - A3721
- 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 - A3720
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 - A3447
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 - A3721
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 - A3719
- Speed
- HSPA, LTE, 5G
Redmi K90 Ultra
- Announced
- 2026 Jun
- Status
- Available. Released 2026 Jun 29
iPhone Duo
- Announced
- 2026, September 09
- Status
- Coming soon. Exp. release 2026, October 23
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 Duo
- Dimensions
Unfolded: 117.8 x 164.6 x 5.2 mm
Folded: 117.8 x 84.1 x 11.3 mm
- Weight
- 254 g (8.96 oz)
- Build
- Glass front (Ceramic Shield 2) (folded), titanium frame & hindge (grade 5), glass back (Ceramic Shield)
- SIM
· eSIM + eSIM (8 or more, max 2 at a time) - Global
· eSIM + eSIM (China)
IP68 dust tight and water resistant (immersible up to 6m for 30 min)
Stylus support
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 Duo
- Type
- LTPO Super Retina XDR OLED120HzHDR10Dolby Vision1000 nits (typ)1600 nits (HBM)3000 nits (peak)
- Size
- 7.6 inches, 175.4 cm2 (~90.4% screen-to-body ratio)
- Resolution
- 1878 x 2670 pixels (~430 ppi density)
- Protection
Nano Texture finish
Anti‑reflective coating
Wide-angle OLED matte display
Small display crease
Cover display:
LTPO Super Retina XDR OLED, 120Hz, HDR10, Dolby Vision, 1000 nits (typ), 1600 nits (HBM), 3000 nits (peak)
5.4 inches, 1398 x 2034 pixels, 460 ppi
Ceramic Shield 2, Anti‑reflective coating
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 Duo
- OS
- iOS 27
- Chipset
- Apple A20 Pro (2 nm)
- CPU
- Hexa-core (2x GHz high performance + 4x GHz)
- GPU
- Apple GPU (7-core graphics)
Redmi K90 Ultra
- Card slot
- No
- Internal
- 512GB 16GB RAM, 512GB 12GB RAM, 256GB 16GB RAM, 256GB 12GB RAM
- Interface
- UFS 4.1
iPhone Duo
- Card slot
- No
- Internal
- 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 2TB 12GB RAM
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 Duo
- Dual
48 MP, f/1.6, 26mm (wide), 1/1.56", 1.0µm, PDAF, sensor-shift OIS
48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF
- Features
- Dual-LED dual-tone flash, HDR (photo/panorama)
- Video
- 4K@24/25/30/60/100/120fps1080p@25/30/60/120/240fps10-bit HDRDolby Vision HDR (up to 120fps)ProRes3D (spatial) video/audiostereo sound rec.
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 Duo
- Single
XX MP under display camera, f/1.8, 1080p@30/60fps video
Cover camera:
12 MP multi-aspect, f/2.2, (wide), AF
- Features
- HDR, Dolby Vision HDR, spatial audio, stereo sound rec.
- Video
- 4K@24/25/30/60fps, 1080p@25/30/60/120fps, gyro-EIS
Redmi K90 Ultra
- Loudspeaker
- 3
- 3.5mm jack
- No
- Audio features
- Voice speakerSpeakerphoneANCHD VoiceVoLTEViLTE
iPhone Duo
- Loudspeaker
- Yes, with stereo speakers
- 3.5mm jack
- No
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 Duo
- 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
- Sensors
- AccelerometerGyroCompassIn-screen FP sensorL sensorP sensorStep counterNFC
- Software
- Voice CommandBusiness card recognitionNavigation softwareAugmented Reality (AR)Intelligent personal assistantVoice RecognitionFace Recognition
iPhone Duo
- Sensors
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Ultra Wideband (UWB) support (gen2 chip)
Emergency SOS, Messages and Find My via satellite
Redmi K90 Ultra
- Type
- 8550 mAh battery Li-ion (Si-C)
- Charging
- 100.0 W charging wired
iPhone Duo
- Type
- Li-Ion
- Charging
Wired, PD3.2, AVS, 50% in 20 min
25W wireless MagSafe/Qi2, 50% in 30 min
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 Duo
- Colors
- Night Sky, Star White
- Models
- A3720, A3721, A3447, A3719
- Price
- About 2300 EUR