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                        Vivo X27 | 
                    
                        Realme C51 | 
                
| Build | |
|---|---|
| OS | |
| Android 9.0 (Pie) | Android 13 OS | 
| UI | |
| Function OS 9 | Realme UI T | 
| Dimensions | |
| 157.7 x 74.3 x 9 mm | 167.2 x 76.7 x 8 mm | 
| Weight | |
| 180 g | 186 g | 
| SIM | |
| Hybrid Dual SIM, Dual Standby, (Nano-SIM) | Dual Sim, Dual Standby (Nano-SIM) | 
| Colors | |
| Blue, Gold | Mint Green, Carbon Black | 
| Network | |
|---|---|
| 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  | 
                    
| 3G | |
| Yes | Yes | 
| 4G | |
| Yes | Yes | 
| 5G | |
| No | No | 
| Processor | |
|---|---|
| CPU | |
| Octa-core (2 x 2.2 GHz 360 Gold + 6 x 1.7 GHz Kryo 360 Silver) | Octa-core (2 x 1.8 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55) | 
| Chipset | |
| Qualcomm SDM710 Snapdragon 710 (10 nm) | Unisoc Tiger T612 (12 nm) | 
| GPU | |
| Adreno 616 | Mali-G57 | 
| Display | |
|---|---|
| Technology | |
| Super AMOLED Capacitive Touchscreen, 16M Colors, Multitouch | IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch | 
| Size | |
| 6.39 Inches | 6.74 Inches | 
| Resolution | |
| 1080 x 2340 Pixels (~403 PPI) | 720 x 1600 Pixels (~260 PPI) | 
| Protection | |
| Panda Glass | |
| Extra Features | |
| 90Hz, 560 nits (peak) | |
| Memory | |
|---|---|
| Built-in | |
| 256GB Built-in, 8GB RAM | 64GB Built-in, 4GB RAM | 
| External Card | |
| microSD Card, (supports up to 256GB) | microSDXC (dedicated slot) | 
| Camera | |
|---|---|
| Main | |
| Triple Camera: 48 MP, f/1.8, 1/2", PDAF + 13 MP, (ultrawide) + 5 MP, f/2.4, depth sensor, LED Flash | Dual Camera: 50 MP, f/1.8, 27mm (wide), 1/2.76", PDAF + 0.08 MP, f/3.0, (depth), LED Flash | 
| Features | |
| Phase detection, Geo-tagging, touch focus, face detection, HDR, panorama, Video (1080p@30fps) | HDR, panorama, Video (1080p@30fps) | 
| Front | |
| 16 MP (Motorized pop-up), HDR, Video (1080p@30fps) | 5 MP, f/2.2, 28mm (wide), 1/5", HDR, Video (720p@30fps) | 
| Connectivity | |
|---|---|
| WLAN | |
| Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band | 
| Bluetooth | |
| v5.0 with A2DP, LE, EDR, apt-X | v5.0 with A2DP, LE | 
| GPS | |
| Yes + A-GPS support, & GLONASS, BDS | Yes + A-GPS support, & GLONASS, BDS, GALILEO | 
| Radio | |
| FM Radio | |
| USB | |
| 2.0, Type-C 1.0 reversible connector | USB Type-C 2.0 | 
| NFC | |
| Yes | Yes | 
| Data | |
| GPRS, Edge, 3G (HSPA 42.2/5.76 Mbps), 4G (LTE-A (2CA) Cat12 600/50 Mbps) | GPRS, Edge, 3G (HSPA 42.2/11.5 Mbps), 4G LTE-A | 
| Sensors | |
|---|---|
| Accelerometer | |
| Yes | Yes | 
| Compass | |
| Yes | Yes | 
| Proximity | |
| Yes | Yes | 
| FingerPrint | |
| Yes | Yes | 
| Features | |
|---|---|
| Audio | |
| 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone | 3.5mm Audio Jack, 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 | 
| Battery | |
|---|---|
| Capacity | |
| (Li-Po Non removable), 4000 mAh | (Li-Po Non removable), 5000 mAh | 
| Features | |
| Fast battery charging 18W | Fast charging 33W wired, 0-50% in 28 min (advertised) | 
| Price | |
|---|---|
| Price in Rs. | |
| Discontinued | Rs. 28,999 PKR | 
| Price in USD | |
| Discontinued | $100.69 USD |