Xiaomi Redmi K20 (6GB RAM + 128GB) vs Xiaomi Redmi K90
Quick Comparison
Xiaomi Redmi K90 has better RAM than Xiaomi Redmi K20 (6GB RAM + 128GB). In terms of display resolution, Xiaomi Redmi K90 has better resolution of 2510 x 1156 than Xiaomi Redmi K20 (6GB RAM + 128GB) which has resolution of 2340 x 1080. Xiaomi Redmi K90 has more internal memory than Xiaomi Redmi K20 (6GB RAM + 128GB)
| Name | Xiaomi Redmi K20 (6GB RAM + 128GB) | Xiaomi Redmi K90 |
| RAM | 6 GB | 12 GB |
|---|---|---|
| Display | 6.39 in | 6.59 in |
| Internal Memory | 128 GB | 256 GB |
| Battery | 4000 mAh | 7100 mAh |
| Camera | 48 MP + 13 MP + 8 MP Triple | 50 MP + 50 MP + 8 MP Triple |
| Price | Rs. 17790 | Rs. 35990 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is July 17, 2019. The cost of Xiaomi Redmi K20 (6GB RAM + 128GB) is Rs. 17790. The launch Date of the second phone is October 27, 2025. The Expected cost of Xiaomi Redmi K90 is Rs. 35990.
Display comparison
Xiaomi Redmi K90 has larger screen size of 6.59 inches in comparison to Xiaomi Redmi K20 (6GB RAM + 128GB)'s 6.39 inch screen. Both the phones have AMOLED Screen Type. Xiaomi Redmi K90 has display density of 419 PPI & Xiaomi Redmi K20 (6GB RAM + 128GB) has only 403 PPI display density. In terms of screen to body ratio, Xiaomi Redmi K20 (6GB RAM + 128GB) has better screen to body ratio of ~ 91.9% than Xiaomi Redmi K90's ~ 87.5%. Xiaomi Redmi K20 (6GB RAM + 128GB) has 19.5:9 aspect ratio where as Xiaomi Redmi K90 has 20:9 aspect ratio.
Memory comparison
Xiaomi Redmi K90's larger 12 GB RAM is better for playing games and all with respect to Xiaomi Redmi K20 (6GB RAM + 128GB)'s lower 6 GB RAM. Xiaomi Redmi K90 has more Internal Memory (256 GB) than Xiaomi Redmi K20 (6GB RAM + 128GB) (128 GB).
Camera comparison
Xiaomi Redmi K90's 50 MP + 50 MP + 8 MP Triple Rear Camera outclasses Xiaomi Redmi K20 (6GB RAM + 128GB)'s 48 MP + 13 MP + 8 MP Triple Rear Camera in terms of resolution. Both of them stand equal in terms of Front Camera Resolution as both have 20 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 9.0 and the second one on 16 version.
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Full Comparison
| Name | Xiaomi Redmi K20 (6GB RAM + 128GB) | Xiaomi Redmi K90 |
| General | ||
| Model | Redmi K20 | K90 |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | July 17, 2019 | October 27, 2025 |
| Design | ||
| Dimensions | 74.3 x 156.7 x 8.8 mm | 75.25 x 157.49 x 8 mm |
| Weight | 191 g | 206 g |
| Display | ||
| Type | Color AMOLED Screen (16M Colors) | Color AMOLED Screen (1B Colors) |
| Touch | Yes | Yes, 480 Hz Touch Sampling Rate |
| Size | 6.39 inches, 1080 x 2340 pixels | 6.59 inches, 1156 x 2510 pixels, 120 Hz |
| Aspect Ratio | 19.5:9 | 20:9 |
| PPI | ~ 403 PPI | ~ 419 PPI |
| Screen to Body Ratio | ~ 91.9% | ~ 87.5% |
| Brightness | 3500nits | |
| Features | Corning Gorilla Glass 5, Always On Display, Dark Mode, Reading Mode 2.0 | |
| Notch | No | Yes, Punch Hole |
| Memory | ||
| RAM | 6 GB | 12 GB |
| Storage | 128 GB | 256 GB |
| Storage Type | UFS 4 | |
| Card Slot | No | |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | |
| 5G Bands | n1/n3/n5/n7/n8/n28/n66/n38/n40/n41/n48/n77/n78 | |
| VoLTE | Yes | Yes |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | Wi-Fi 7 | |
| Bluetooth | Yes, v5.0 | Yes, v5.4, A2DP, LE |
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging |
| IR Blaster | Yes | |
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS. Up to tri-band: GLONASS, BDS, GALILEO, QZSS, NavIC |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Vibration moto,r Proximity, Ambient light, Electronic compass, Accelerometer, Gyroscope | Accelerometer, Gyro, Proximity, Compass, Color Spectrum |
| 3.5mm Headphone Jack | Yes | No |
| NFC | Yes | |
| Splash Resistant | Yes | |
| Dust Resistant | No | |
| Extra Features | UFS2.1 | |
| Camera | ||
| Rear Camera | 48 MP ƒ/1.8 (Main) 13 MP ƒ/2.4 (Wide Angle) 8 MP ƒ/2.4 (Telephoto) | 50 MP (Wide Angle) 50 MP (Telephoto) 8 MP (Wide Angle) |
| OIS | Yes | |
| Auto Focus | Yes | Yes |
| Features | Triple camera zoom, PDAF Focus mode, Monochrome Dual Flash, Slow Motion | |
| Video Recording | 1080p @ 120/30/60 fps FHD, 720p @ 30 fps HD | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 30/60 fps FHD, 720p @ 1920 fps HD |
| Flash | Yes, Dual LED | Yes, Dual LED |
| Front Camera | 20 MP ƒ/2.2 Popup | 20 MP (Wide Angle) Punch Hole |
| Front Video Recording | 1080p @ 30 fps FHD, 720p @ 30 fps HD | 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v9.0 (Pie), upgradable to v11 | Android v16 |
| Custom UI | HyperOS 3 | |
| Chipset | Qualcomm Snapdragon 730 | Qualcomm Snapdragon 8 Elite |
| CPU | 2.2 GHz, Octa Core Processor | 4.32 GHz, Octa Core Processor |
| Core Details | 2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver | 2x Prime Core@4.32 GHz & 6x Performance Core@3.53 GHz |
| GPU | Adreno 618 | Adreno GPU |
| Java | No | No |
| Browser | Yes, supports HTML5 | Yes |
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | Yes |
| Video | Yes | Yes |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 4000 mAh, Li-Po Battery | 7100 mAh |
| Fast Charging | Yes, 18W Fast Charging | Yes, 100W Fast charging |
| Reverse Charging | Yes, 22.5W | |