Side-by-side technical data
Xiaomi Redmi K90 Ultra vs Xiaomi Redmi 12 5G
Comparison between Xiaomi Redmi K90 Ultra and Xiaomi Redmi 12 5G: camera, battery, fast charging, display, performance and colors, side by side. More phones from Xiaomi.
NeoTeo's verdict
Which of the two is the better buy
The Xiaomi Redmi K90 Ultra is the pick for more power and a markedly better display; the Redmi 12 5G makes more sense for Google Services, expandable storage, and lower weight. The gap also shows in their overall scores: 8.2 versus 5.6.
The K90 Ultra pairs a 165 Hz AMOLED display rated at 9500 nits with 447 ppi; the Redmi 12 5G has a 90 Hz IPS LCD rated at 550 nits and 396 ppi. They also use the Snapdragon 8 Elite and Snapdragon 4 Gen 2, with 16 GB and 8 GB of RAM, respectively. The K90 Ultra has an 8550 mAh battery and 100 W charging, against 5000 mAh and 18 W.
For cameras, the K90 Ultra records 8K at 30 fps and includes an ultrawide camera; the Redmi 12 5G records at 1080p. The K90 Ultra adds Wi-Fi 7, while the Redmi keeps a 3.5 mm audio jack. Google Services and expandable storage come with the Redmi 12 5G, but neither is available on the K90 Ultra.
Xiaomi Redmi K90 Ultra
The Xiaomi Redmi K90 Ultra is the better buy for more power, a 165 Hz AMOLED display, and 100 W charging.
Xiaomi Redmi 12 5G
The Xiaomi Redmi 12 5G is the better buy for anyone who needs Google Services and expandable storage.
The verdict
Your pick: Xiaomi Redmi K90 Ultra, ahead on Design & display, Performance & hardware, Camera, Connectivity and Battery & charging.
| Category | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Design & display | 8.6 | 5.4 |
| Performance & hardware | 9.1 | 4.7 |
| Camera | 7.4 | 5.8 |
| Connectivity | 7.9 | 6.7 |
| Battery & charging | 8.3 | 5.4 |
Which one is for you?
Xiaomi Redmi K90 Ultra, if you care about…
- Battery Capacity
- 8,550 mAh
- against 5,000 mAh
- AnTuTu Score
- 3,081,184
- against 456,552
- RAM Capacity
- 16 GB
- against 8 GB
- Wi-Fi Standards
- Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 7 (802.11be), Wi-Fi 802.11a/b/g
- against Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Xiaomi Redmi 12 5G, if you care about…
- Weight
- 199 g
- against 227 g
- Expandable Storage
- Yes
- against No
- Google Services
- Yes
- against No
Specification comparison
Performance
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Processor Model | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 4 Gen 2 |
| Processor Process Size | 3 nm Best value | 4 nm |
| Graphics GPU | Qualcomm Adreno 830 | Qualcomm Adreno 613 |
| Storage Type | UFS 4.1 Best value | UFS 2.2 |
| Maximum CPU Clock | 4.32 GHz Best value | 2.2 GHz |
| Maximum Storage Capacity | 1 TB Best value | 256 GB |
| AnTuTu Score | 3,081,184 Best value | 456,552 |
| Geekbench 6 Single-Core | 3,234 Best value | 815 |
| Geekbench 6 Multi-Core | 10,059 Best value | 1,984 |
| CPU Description | Octa-core CPU with 2x4.32 GHz and 6x3.53 GHz cores | Octa-core CPU with 2x2.2 GHz Cortex-A78 and 6x1.95 GHz Cortex-A55 cores. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 16 GB Best value | 8 GB |
| RAM Type | LPDDR5X Best value | LPDDR4X |
| Expandable Storage | No | Yes Best value |
| AnTuTu version | v11 | v10 |
Design
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Body Colors | Black, Blue, Silver | Black, White, Blue, Silver |
| Body Thickness | 8.2 mm | 8.2 mm |
| Body Width | 77.9 mm | 76.3 mm |
| Body Height | 162.9 mm | 168.6 mm |
| Weight | 227 g | 199 g Best value |
| Usable Surface | 90.3 % Best value | 85.1 % |
| Body Materials | Glass, Aluminium Alloy Best value | Glass, Plastic |
| Resistance Features | IP68, IP69, IP66 Best value | IP53 |
| Waterproof Depth | 1.5 m | — |
Battery
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Battery Capacity | 8,550 mAh Best value | 5,000 mAh |
| Battery Type | Si-Carbon Li-Ion Best value | Li-Polymer |
| Fast Charge Power | 100 W Best value | 18 W |
| Battery Features | Non-Removable, Fast Charging, Reverse Charging, Reverse Wireless Charging, Rechargeable, Battery Level Indicator Best value | Fast Charging, Non-Removable, Battery Level Indicator, Charger Included, Rechargeable |
| Reverse wireless charging power | 22.5 W | — |
Display
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Display Aspect Ratio | 19.5:9 | 21:9 |
| Display Technology | AMOLED Best value | IPS LCD |
| Peak Display Brightness | 9,500 nits Best value | 550 nits |
| Display Diagonal | 6.83″ Best value | 6.79″ |
| Display Horizontal Resolution | 1,280 px Best value | 1,080 px |
| Display Vertical Resolution | 2,772 px Best value | 2,460 px |
| Display Pixel Density | 447 ppi Best value | 396 ppi |
| Display Refresh Rate | 165 Hz Best value | 90 Hz |
| Touch Sampling Rate | 480 Hz Best value | 240 Hz |
| Display Contrast Ratio | 8,000,000 :1 Best value | 1,500 :1 |
| Display Features | Hole-Punch Notch, HDR10, HDR10+, Dolby Vision, Always-On Display, Capacitive Touch, Multi-Touch, Gorilla Glass, DC Dimming, DCI-P3, TÜV Rheinland Low Blue Light, TÜV Rheinland Flicker-Free Certified, TÜV Rheinland Eye Comfort Certification, Scratch Resistant, Frameless | Gorilla Glass, Hole-Punch Notch, SGS Certified, Scratch Resistant, Capacitive Touch, Frameless |
Sensors
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Fingerprint Sensor Placement | Under Display | Side |
Sensor
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Gyroscope, Compass, Hall Sensor, Light Sensor, RGB Sensor, Cooling System | Fingerprint Sensor, Accelerometer, Compass, Virtual Proximity Sensing |
Software
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Operating System | Android 16 | Android 13 |
| OS Family | Android | Android |
| OS Version | 16 Best value | 13 |
| OS Update Support | — | 2 years |
| Google Services | No | Yes Best value |
Connectivity
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| SIM Configurations | Dual Nano-SIM, Dual SIM Dual Standby | Dual Nano-SIM, Dual SIM Dual Standby |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B6, 3G UMTS B8, 3G UMTS B19, 4G LTE B1, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B19, 4G LTE B28A, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41, 4G LTE B42, 4G LTE B48, 4G LTE B66, 5G NR n1, 5G NR n3, 5G NR n5, 5G NR n7, 5G NR n8, 5G NR n28a, 5G NR n38, 5G NR n40, 5G NR n41, 5G NR n48, 5G NR n66, 5G NR n77, 5G NR n78 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B4, 3G UMTS B5, 3G UMTS B6, 3G UMTS B8, 3G UMTS B19, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B12, 4G LTE B13, 4G LTE B17, 4G LTE B18, 4G LTE B19, 4G LTE B20, 4G LTE B26, 4G LTE B28A, 4G LTE B28B, 4G LTE B32, 4G LTE B38, 4G LTE B40, 4G LTE B41, 4G LTE B66, 5G NR n1, 5G NR n3, 5G NR n5, 5G NR n7, 5G NR n8, 5G NR n20, 5G NR n28a, 5G NR n28b, 5G NR n38, 5G NR n40, 5G NR n41, 5G NR n66, 5G NR n77, 5G NR n78 |
| Cellular Technologies | GSM, HSPA, LTE, 5G | GSM, HSPA, LTE, 5G |
| Wi-Fi Standards | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 7 (802.11be), Wi-Fi 802.11a/b/g Best value | Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) |
| Wi-Fi Features | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, MIMO | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display |
| Bluetooth Version | Bluetooth 5.4 Best value | Bluetooth 5.3 |
| Bluetooth Profiles | A2DP, LE, LHDC 5.0, ASHA, Auracast | A2DP, LE, EDR, HID |
| Navigation Systems | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC Best value | GPS, A-GPS, GLONASS, Galileo, BeiDou |
| Connectivity Features | USB Charging, USB Mass Storage, USB OTG, USB Type-C, NFC, Computer Sync, OTA Sync, Tethering, Infrared, VoLTE | USB Charging, USB Mass Storage, USB OTG, USB Type-C, NFC, 3.5 mm Audio Jack, FM Radio, Computer Sync, OTA Sync, Tethering, Infrared, VoLTE, VoWiFi, Virtual Proximity Sensing |
| USB Version | USB 3.2 | USB Type-C |
| SAR American Head | — | 1.09 W/kg |
| SAR American Body | — | 0.88 W/kg |
| SAR (EU) head | — | 0.98 W/kg |
| SAR (EU) body | — | 1 W/kg |
| Max. download speed | 10,000 Mbps Best value | 2,500 Mbps |
| Max. upload speed | 3,500 Mbps Best value | 900 Mbps |
Audio
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Audio Features | Stereo Speakers, Dolby Atmos, Hi-Res Audio, Hi-Res Wireless Audio, A2DP, LE, LHDC 5, ASHA, Auracast | A2DP, LE, Stereo Speakers, Hi-Res Audio, EDR, HID |
Technical
| Specification | Redmi K90 Ultra | Redmi 12 5G |
|---|---|---|
| Model numbers | 2604FRK1EC | 23076RN4BI, 23076RN8DY, 2AFZZRN8DY |
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