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Oppo F21 Pro vs Oppo A3x 128GB

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 / 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), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 159.9 x 73.2 x 7.5 mm   165.8 x 76.1 x 7.7 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 175 g   186 g  
Display Type 90Hz, 430 nits (typ), 600 nits (HBM), 800 nits (peak)   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 1000 nits (HBM)  
Display Size 1080 x 2400 Pixels (~409 PPI)   6.67 Inches   720 x 1604 Pixels (~264 PPI)  
Protection Corning Gorilla Glass 5   Panda Glass  
Memory 128GB Built-in, 8GB RAM, UFS 2.2   128GB Built-in, 4GB RAM, eMMC 5.1  
Card slot microSD Card, (supports up to 1TB)   microSDXC  
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  
BlueTooth v5.1 with A2DP, LE, apt-X HD   v5.0 with A2DP, LE  
USB USB Type-C 2.0, USB On-The-Go   USB Type-C 2.0, OTG  
NFC No   No  
GPS Yes + A-GPS support, & GLONASS, GALILEO, QZSS   Yes + A-GPS support, & GLONASS, BDS, GALILEO  
Main Camera Phase detection, Geo-tagging, touch focus, face detection, HDR, panorama, Video ([email protected], gyro-EIS)   Dual Camera: 8 MP, f/2.0, (wide), PDAF + Auxiliary lens, LED Flash   HDR, panorama, Video (1080p@30/60fps)  
Front Camera 32 MP, f/2.4, 24mm (wide), 1/2.74", Panorama, HDR, Video ([email protected], gyro-EIS)   5 MP, f/2.2, (wide), Video (1080p@30fps)  
OS Android 12 OS   Android 14 OS  
Chipset Qualcomm SM6225 Snapdragon 680 4G (6 nm)   Qualcomm Snapdragon 6s Gen 1  
Processor Octa-core (4 x 2.4 GHz Kryo 265 Gold + 4 x 1.9 GHz Kryo 265 Silver)   Octa Core  
GPU Adreno 610   Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity   Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone   3.5mm Audio Jack, Speaker Phone  
Colors Cosmic Black, Sunset Orange   Nebula Red, Ocean Blue  
Battery - Fast charging 33W, Reverse charging   (Non removable), 5100 mAh   - Fast battery 45W wired, PD2.0, PPS, 50% in 30 min (advertised)  
Misc Active noise cancellation with dedicated mic, Document editor, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant MIL-STD-810H compliant*, * does not guarantee ruggedness or use in extreme conditions, Document editor, Photo/video editor