Xiaomi Redmi 17 5G (8GB RAM + 128GB) vs Vivo S21
Quick Comparison
Both Xiaomi Redmi 17 5G (8GB RAM + 128GB) and Vivo S21 comes with same RAM. In terms of display resolution, Vivo S21 has better resolution of 2800 x 1260 than Xiaomi Redmi 17 5G (8GB RAM + 128GB) which has resolution of 1600 x 720. Vivo S21 has more internal memory than Xiaomi Redmi 17 5G (8GB RAM + 128GB)
| Name | Xiaomi Redmi 17 5G (8GB RAM + 128GB) | Vivo S21 |
| RAM | 8 GB | 8 GB |
|---|---|---|
| Display | 6.9 in | 6.78 in |
| Internal Memory | 128 GB | 256 GB |
| Battery | 7900 mAh | 6700 mAh |
| Camera | 50 MP + Auxiliary lens Dual | 50 MP + 50 MP Dual |
| Price | Rs. 26999 | Rs. 29990 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is September 03, 2026. The cost of Xiaomi Redmi 17 5G (8GB RAM + 128GB) is Rs. 26999. The launch Date of the second phone is expected to be November 28, 2026 (Expected). The cost of Vivo S21 is Rs. 29990.
Display comparison
Xiaomi Redmi 17 5G (8GB RAM + 128GB) has larger screen size of 6.9 inches in comparison to Vivo S21's 6.78 inch screen. Xiaomi Redmi 17 5G (8GB RAM + 128GB) has IPS Screen type where as Vivo S21 has AMOLED Screen type. Vivo's phone has display density of 453 PPI & Xiaomi's phone has only 254 PPI display density. In terms of screen to body ratio, Vivo's phone has better screen to body ratio of ~ 90.2% than Xiaomi's phone ~ 86.2%. Xiaomi Redmi 17 5G (8GB RAM + 128GB) has 20.6:9 aspect ratio where as Vivo S21 has 20:9 aspect ratio.
Memory comparison
Both mobiles come with 8 GB RAM Vivo S21 has more Internal Memory (256 GB) than Xiaomi Redmi 17 5G (8GB RAM + 128GB) (128 GB).
Camera comparison
They both have the same 50 MP + Auxiliary lens Dual Rear Camera. Vivo S21 will be better choice if you're looking to click lot of selfies as it has better 50 MP Front Camera in comparison to Xiaomi Redmi 17 5G (8GB RAM + 128GB)'s 8 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 16 and the second one on 15 version.
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Full Comparison
| Name | Xiaomi Redmi 17 5G (8GB RAM + 128GB) | Vivo S21 |
| General | ||
| Country of Origin | India | |
| Model | 17 | S21 |
| Sim Type | Dual Sim, GSM+GSM (Hybrid Slot) | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | September 03, 2026 | November 28, 2026 (Expected) |
| In The Box | Mobile Phone, 45W Adapter, USB Type-C Cable, SIM Eject Tool, Safety Information, Quick Start Guide and Warranty Card | |
| Design | ||
| Dimensions | 78.42 x 170.12 x 8.8 mm | |
| Weight | 232 g | |
| Bezel less | Yes | |
| Colors | Absolute Black, Endless Blue, Eternal Orange | |
| Display | ||
| Type | Color IPS Screen (16M Colors) | Color AMOLED Screen (1B Colors) |
| Touch | Yes, 240 Hz Touch Sampling Rate | Yes |
| Size | 6.9 inches, 720 x 1600 pixels, 120 Hz | 6.78 inches, 1260 x 2800 pixels, 120 Hz |
| Aspect Ratio | 20.6:9 | 20:9 |
| PPI | ~ 254 PPI | ~ 453 PPI |
| Screen to Body Ratio | ~ 86.2% | ~ 90.2% |
| Glass Type | Durable Corning Gorilla Glass 7i | |
| Brightness | Brightness: 825 nits HBM | |
| Features | TÜV Rheinland Low Blue Light (Software Solution), TÜV Rheinland Circadian Friendly, TÜV Rheinland Flicker Free | 5000 nits (peak) |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Curved Display | Yes | |
| Memory | ||
| RAM | 8 GB | 8 GB |
| RAM Type | LPDDR4X | |
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 128 GB | 256 GB |
| Storage Type | UFS 2.2 | |
| Card Slot | Yes, (Hybrid Slot), upto 2 TB | |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | SA: n1/n3/n5/n8/n28/n40/n78, NSA: n1/n3/n5/n8/n28/n40/n78 | n1/n3/n5/n8/n28A/n38/n40/n41/n77/n78 |
| VoLTE | Yes | Yes, Dual Stand-By |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | 2.4GHz | 5GHz | Wi-Fi 7 |
| Bluetooth | Yes, v5.1, A2DP, LE | Yes, v6.0, A2DP, LE, aptX HD |
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go |
| IR Blaster | Yes | Yes |
| Extra | ||
| GPS | GPS, Glonass, Galileo, Beidou | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS |
| Fingerprint Sensor | Yes, Side | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Vertual Proximity Sensor, Ambient Light Sensor, Accelerometer, Electronic Compass | Accelerometer, Gyro, proximity, Compass |
| 3.5mm Headphone Jack | Yes | No |
| NFC | Yes | Yes |
| AI Features | Circle to Search, Gemini AI, AI Erase | |
| Water Resistance | Yes | |
| Splash Resistant | Yes | |
| IP Rating | IP64 | IP64 |
| Dust Resistant | Yes | Yes |
| Extra Features | Dynamic RGB Light Ring on Back, Xiaomi HyperIsland | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) 5P lens, f/1.8 (Auxiliary lens) | 50 MP ƒ/1.9 (Wide Angle) 50 MP ƒ/2.2 (Ultra Wide) |
| OIS | Yes | |
| Auto Focus | Yes | Yes |
| Features | Filmcamera, Hdr Mode, Night Mode, Auto Night Mode, Portrait Mode, Time-laps, Dual Camera Recording, Document Mode | HDR |
| Video Recording | 1080p @ 30 fps FHD | 4K, 1080p |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 8 MP ƒ/2.1 (Wide Angle) Punch Hole, Screen Flash | 50 MP ƒ/2 (Wide Angle) Punch Hole |
| Front Video Recording | 1080p @ 30 fps FHD | 4K, 1080p |
| Front Camera Features | Hdr Mode | Soft-light Ringportrait Mode | Time-lapse | Night Mode | Dual Camera Recording | HDR |
| Technical | ||
| OS | Android v16 | Android v15 |
| Custom UI | Xiaomi HyperOS 3 | OriginOS 6 |
| Chipset | Qualcomm Snapdragon 4 Gen5 | |
| CPU | 2.4 GHz, Octa Core Processor | Octa Core Processor |
| Core Details | Cortex-A78+Cortex-A55 | |
| GPU | Adreno | |
| Java | No | No |
| Browser | Yes | Yes |
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | Yes |
| Video | Yes | Yes |
| FM Radio | Yes | No |
| Audio Features | High Efficiency Video Coding (HEVC) | |
| Audio Jack Type | 3.5mm | |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 7900 mAh, Si/C Li-Ion | 6700 mAh, SI/C |
| Fast Charging | Yes, 45W | Yes, 100W Fast Charging |
| Reverse Charging | Yes, 22.5W reverse wired | Yes |