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Oppo Oppo F21 Pro 5G vs Vivo Y55

2G Network SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900   SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 2100   HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)   LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)  
5G Network SA/NSA  
Dimensions 159.9 x 73.2 x 7.5 mm   160.80 x 73.79 x 8.42mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 173 g   182 g  
Display Type 430 nits (typ), 600 nits (HBM)   AMOLED Capacitive Touchscreen, Multitouch  
Display Size 1080 x 2400 Pixels (~409 PPI)   6.44 Inches   1080 x 2400 Pixels (~409 PPI)  
Protection Schott Xensation glass  
Memory 128GB Built-in, 8GB RAM, UFS 2.2   128GB Built-in, 8GB RAM  
Card slot microSDXC   microSD Card, (supports up to 1TB)  
GPRS Yes Yes
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 v5.1 with A2DP, LE, apt-X HD   v5.1 with A2DP, LE  
USB USB Type-C 2.0, USB On-The-Go   USB Type-C, USB On-The-Go  
NFC No   Yes  
GPS Yes + A-GPS support, & GLONASS, GALILEO, QZSS   Yes + A-GPS support, & GLONASS, BDS, GALILEO, QZSS  
Main Camera Phase detection, Geo-tagging, touch focus, face detection, HDR, panorama, Video ([email protected], gyro-EIS)   Triple Camera: 50 MP, f/1.8, 26mm (wide), PDAF + 2 MP, f/2.4, (macro) + 2 MP, f/2.4, (depth), Dual LED Flash   Night, Portrait, Photo, Double Exposure, Live Photo, Panorama, Slow Motion, Time-Lapse, Pro, Video  
Front Camera 16 MP, f/2.4, 27mm (wide), HDR, panorama, Video ([email protected])   16 MP  
OS Android 12 OS   Android 12 OS  
Chipset Qualcomm SM6375 Snapdragon 695 5G (6 nm)   Qualcomm Snapdragon 680 4G  
Processor Octa-core (2 x 2.2 GHz Kryo 660 Gold + 6 x 1.7 GHz Kryo 660 Silver)   Octa core (4 x 2.4 GHz Kryo 265 + 4 x 1.9 GHz Kryo 265)  
GPU Adreno 619   Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity   Accelerometer, Compass, Fingerprint (side mounted), Gyro, Proximity  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone   3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone  
Colors Rainbow Spectrum, Cosmic Black   Midnight Galaxy, Ice Dawn  
Battery - Fast charging 33W, 31% in 15 min, 100% in 63 min (advertised), Reverse charging, USB Power Delivery   (Li-Po Non removable), 5000 mAh   - Fast charging 44W  
Misc RGB ring lights around the cameras (notifications, charging progress), IPX4, dust and water resistant, Document editor, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, Plastic frame, Plastic back, Active noise cancellation with dedicated mic, Document viewer, Photo/video editor