OnePlus 5T | 
                                    
                                    
                                    
                                        
                                        Vivo Y21d | 
                                    
                                    
                                    
                                        
                                         
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| Build | OS | Android v7.1.1 Nougat | Android 15 OS | |
| UI | Oxygen OS 4.7 | Funtouch 15 | ||
| Dimensions | 156.1 x 75 x 7.3 mm | 166.14 x 77.01 x 8.39 mm | ||
| Weight | 162 g | 209 g | ||
| SIM | Dual Sim, Dual Standby (Nano-SIM) | Nano-SIM + Nano-SIM | ||
| Colors | Midnight Black | Coral Red, Jade Green | ||
| 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  | 
                                                |
| 3G Band | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 | ||
| 4G Band | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700), 30(2300), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100) | LTE band 1(2100), 3(1800), 5(850), 8(900), 28(700), 38(2600), 40(2300), 41(2500) | ||
| Processor | CPU | Octa-core (4 x 2.45 GHz Kryo + 4 x 1.9 GHz Kryo) | Octa-Core (2 × 1.8 GHz + 6 × 1.8 GHz) | |
| Chipset | Qualcomm MSM8998 Snapdragon 835 | Unisoc T7225 (12 nm) | ||
| GPU | Adreno 540 | Arm Mali G57 | ||
| Display | Technology | Optic Amoled Capacitive Touchscreen, 16M Colors | IPS LCD Capacitive Touchscreen | |
| Size | 6.0 Inches | 6.68 Inches | ||
| Resolution | 1080 x 2160 Pixels (~402 PPI) | 720 x 1608 Pixels (~264 PPI) | ||
| Protection | Corning Gorilla Glass 5 | |||
| Extra Features | DCI-P3 | 90Hz, 1000 nits Brightness | ||
| Memory | Built-in | 64/128GB Built-in, 6/8GB RAM | 128GB Built-in, 6GB RAM, eMMC 5.1 | |
| Card | No | microSD Card, (supports up to 2TB) | ||
| SMS | ||||
| Camera | Main | Dual: 16 MP (f/1.7, 27mm, 1/2.8 | Dual Camera: 50 MP, f/1.8 + 0.08 MP, f/2.2, LED Flash | |
| Features | Phase detection autofocus, dual-LED flash, check quality, Geo-tagging, touch focus, face detection, HDR, panorama, Video (2160p@30fps, 1080p@30/60fps, 720p@30/120fps) | Night, Portrait, Video, Live Photo, Slo-mo, Time-lapse, Panorama, Video | ||
| Front | 16 MP (f/2.0, 20mm, 1.0 µm), gyro EIS, Auto HDR, 1080p | 5 MP | ||
| Connectivity | WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Bluetooth | v5.0 with A2DP, LE, aptX HD | v5.2 with A2DP, LE | ||
| GPS | Yes + A-GPS support & Glonass, BDS, GALILEO | Yes + A-GPS support & Glonass, BDS, GALILEO, QZSS | ||
| Radio | FM Radio | |||
| USB | 2.0, Type-C 1.0 reversible connector | USB Type-C 2.0, OTG | ||
| NFC | Yes | No | ||
| Data | GPRS, Edge, 3G HSPA, 4G (LTE-A (3CA) Cat12 600/150 Mbps) | 2G GSM, 3G HSPA, 4G LTE | ||
| Features | Sensors | Accelerometer, Gyro, Compass, Proximity, FingerPrint | Accelerometer, Gyro, Compass, Proximity, FingerPrint | |
| Audio | 3.5mm Audio Jack, DivX/Xvid/MP4/H.265 player, MP3/eAAC+/WMA/WAV/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 | ||
| Torch | Yes | Yes | ||
| Extra | Active noise cancellation with dedicated mic, Dirac HD sound, Document viewer, Photo/video editor | Document viewer, Photo/video editor | ||
| Battery | Capacity | (Li-Po Non removable), 3300 mAh | Li-ion 6500 mAh | |
| Talktime | ||||
| - Fast battery charging 5V 4A 20W (Dash Charge) | - Fast charging 44W | |||
| Price | in Rupees | Rs. N/A | Rs. 43,999 | |
| in USD | $32 | $422 |