Huawei Nova 3i | 
                                    
                                    
                                    
                                        
                                        Vivo Y51 | 
                                    
                                    
                                    
                                        
                                         
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| Build | OS | Android V8.1 Oreo | Android 10 OS | |
| UI | EMUI 8.2 | Funtouch 10.0 | ||
| Dimensions | 157.6 x 75.2 x 7.6 mm | 159.25 x 75.19 x 8.68 mm | ||
| Weight | 169 g | 186 g | ||
| SIM | Hybrid Dual SIM, Dual Standby, (Nano-SIM) | Hybrid Dual SIM, Dual Standby, (Nano-SIM) | ||
| Colors | Black, Airy Blue, Iris Purple, Red, Pearl White | Mystic Black, Jazzy Blue, Dreamy White | ||
| Frequency | 2G Band | SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900  | 
                                                SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900  | 
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| 3G Band | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 2100 | ||
| 4G Band | LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500) | LTE band 1(2100), 5(850), 8(900), 40(2300) | ||
| Processor | CPU | Octa-core (4 x 2.2 GHz Cortex-A73 + 4 x 1.7 GHz Cortex-A53) | Octa-core (4 x 2.0 GHz Kryo 260 Gold + 4 x 1.8 GHz Kryo 260 Silver) | |
| Chipset | Hisilicon Kirin 710 | Qualcomm SDM665 Snapdragon 665 (11 nm) | ||
| GPU | Mali-G51 MP4 | Adreno 610 | ||
| Display | Technology | IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch | Super AMOLED Capacitive Touchscreen, 16M Colors, Multitouch | |
| Size | 6.3 Inches | 6.4 Inches | ||
| Resolution | 1080 x 2340 Pixels (~409 PPI) | 1080 x 2340 Pixels (~403 PPI) | ||
| Extra Features | ||||
| Memory | Built-in | 128GB Built-in, 4GB RAM | 128GB Built-in, 4GB RAM | |
| Card | microSD Card, (supports up to 256GB) | microSDXC (dedicated slot) | ||
| SMS | ||||
| Camera | Main | Dual 16 MP (f/2.2, PDAF) + 2 MP (depth sensor), LED Flash | Quad Camera: 48 MP, f/1.8 + 8 MP, f/2.2 + 2 MP, f/2.4 + 2 MP, f/2.4, LED Flash | |
| Features | Geo-tagging, touch focus, face detection, HDR, panorama, Video (1080p@30fps) | Geo-tagging, Phase detection, Panorama, HDR, Video (4K@30fps, 1080p@30fps; gyro-EIS) | ||
| Front | Dual 24 MP + 2 MP (depth sensor) | 16 MP, f/2.0, (wide), 1/3.06 | ||
| Connectivity | WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Bluetooth | v4.2 with A2DP, LE, EDR, aptX HD | v5.0 with A2DP | ||
| GPS | Yes + A-GPS support, & GLONASS, BDS | Yes + A-GPS support & Glonass, BDS, GALILEO | ||
| Radio | FM Radio | FM Radio | ||
| USB | microUSB 2.0, USB On-The-Go | USB Type-C 2.0, USB On-The-Go | ||
| Infrared | ||||
| Data | GPRS, Edge, 3G HSPA, 4G LTE | GPRS, Edge, 3G (HSPA 42.2/5.76 Mbps), 4G LTE-A | ||
| Features | Sensors | Accelerometer, Gyro, Compass, Proximity, FingerPrint | Accelerometer, Gyro, Compass, Proximity, FingerPrint | |
| Audio | 3.5mm Audio Jack, MP3/eAAC+/WAV/Flac player, XviD/MP4/H.265 player, Speaker Phone | 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone | ||
| Browser | HTML5 | HTML5 | ||
| Messaging | SMS(threaded view), MMS, Email, Push Mail, IM | SMS(threaded view), MMS, Email, Push Mail, IM | ||
| Games | Built-in + Downloadable | Built-in + Downloadable | ||
| Torch | Yes | Yes | ||
| Extra | Active noise cancellation with dedicated mic, Document viewer, Photo/video editor | Active noise cancellation with dedicated mic, Document viewer, Photo/video editor | ||
| Battery | Capacity | (Li-Po Non removable), 3340 mAh | (Li-Po Non removable), 4500 mAh | |
| Talktime | ||||
| - | - Fast battery charging 18W | |||
| Price | in Rupees | Rs. 36,999 | Rs. 32,999 | |
| in USD | $355 | $317 |