Phone Comparison - vivo X21 UD vs Vivo V9 Youth vs Xiaomi Mi A2 (Mi 6X)
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| Price Comparison (India) | - | - | |
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| Manufacturer | vivo | vivo | Xiaomi |
| Announced | March 2018 | March 2018 | April 2018 |
| Status | Coming Soon - March 2018 | Available - April 2018 | Available - April 2018 |
| Price | Rs. 29,900 ($450.00) [Similarly Priced] | Rs. 18,990 ($289.00) [Similarly Priced] | Rs. 16,900 ($250.00) [Similarly Priced] |
| Colors | Black, Aurora White, Ruby Red | Rose Gold, Black | Cherry Pink, Flame Red, Sand Gold, Glacier Blue, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) |
154.81 x 75.03 x 7.89 mm (6.09 x 2.95 x 0.31 in) |
158.7 x 75.4 x 7.3 mm (6.25 x 2.97 x 0.29 in) |
| Weight | 156.2 g (5.5.0.07 oz) | 150 g (5.29 oz) | 168 g (5.93 oz) |
| SIM Type | Hybrid Dual SIM (Nano-SIM, dual stand-by) | Hybrid Dual SIM (Nano-SIM, dual stand-by) | Hybrid Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA - China |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | LTE band 1(2100), 3(1800), 5(850), 40(2300), 41(2500) | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor |
- Fingerprint Sensor |
| Notification LED | Yes | Yes | Yes |
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| OS | Android 8.1 (Oreo) | Android OS, v8.1 (Oreo) | Android 8.1 (Oreo); Android One |
| User Interface | FunTouch OS 4.0 | FunTouch OS 4.0 | - |
| Processor | Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260), Qualcomm SDM660 Snapdragon 660 | Octa-core 1.8 GHz Cortex-A53, Qualcomm Snapdragon 450 | Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260), Qualcomm SDM660 Snapdragon 660 |
| GPU | Adreno 512 | Adreno 506 | Adreno 512 |
| RAM | 6 GB | 4 GB | 6 GB |
| Internal Memory | 128 GB | 32 GB | 128 GB |
| External Memory | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB | microSD, up to 256 GB (uses SIM 2 slot) |
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| Type | Super AMOLED Capacitive Touchscreen | IPS LCD Capacitive Touchscreen | LTPS IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.28 inches | 6.3 inches | 5.99 inches |
| Resolution | 1080 x 2280 pixels (402 ppi) | 1080 x 2280 pixels (400 ppi) | 1080 x 2160 pixels (403 ppi) |
| Screen-to-Body Ratio | 85.06% | 85.48% | 77.44% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | Dual 12 MP + 5 MP | Dual 16 MP + 2 MP | Dual 12 MP + 20 MP |
| Flash | LED Flash | Dual-LED Dual-tone Flash | LED Flash |
| Features | Phase Detection Autofocus, f/1.8 + f/2.4 aperture, Dual Pixel PDAF, 1/2.5", 1.4 µm, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Phase Detection Autofocus, f/2.0 aperture lens, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Phase Detection Autofocus, 1.25µm, f/1.8 aperture lens, 2x Optical Zoom, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | 1080p@30fps | 1080p@30fps | 2160p@30fps, 1080p@30fps, 720p@120fps |
| Front Camera | 12 MP, f/2.0, 1080p [Similar] | 16 MP, f/2.0 [Similar] | 20 MP (f/1.8, 1/2.8", 1.0µm), 1080p, Auto-HDR [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE, 4G VoLTE | HSPA, LTE, 4G, VoLTE | HSPA, LTE |
| Bluetooth | 5.0, A2DP, LE | 4.2, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot | Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot |
| USB | microUSB 2.0, USB On-The-Go | microUSB 2.0 | 2.0, Type-C 1.0 reversible connector |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, BDS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 128 GB, 6 GB RAM | 32 GB, 4 GB RAM | 128 GB, 6 GB RAM or 64 GB, 4/6 GB RAM |
| Expandable Storage | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB | microSD, up to 256 GB (uses SIM 2 slot) |
| USB OTG | Supported | Supported | Not Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| Light Sensor | |
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| Magnetic-Field Sensor (Compass) | |
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| Gyroscope Sensor | |
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| NFC | |
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| Type | Non-removable Li-Ion Battery | Non-removable Li-Po Battery | Non-removable Li-Ion Battery |
| Capacity | 3200 mAh | 3260 mAh | 3010 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 18,990 
Rs. 18,990 
