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Samsung Galaxy S21 vs Samsung Galaxy A57 12GB

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 / 1700(AWS) / 1900 / 2100   HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100)   LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500)  
5G Network 5G SA/NSA   SA/NSA/Sub6  
Dimensions 151.7 x 71.2 x 7.9 mm   161.5 x 76.8 x 6.9 mm  
Sim Type Dual Sim, Dual Standby, eSIM (Nano-SIM)   Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)  
Weight 171 g   179 g  
Display Type Eye Comfort Shield, Always-on display, 120Hz, HDR10+, 1300 nits (peak)   Super AMOLED Plus Touchscreen   120Hz, HDR10+, 1200 nits (HBM), 1900 nits (peak)  
Display Size 1080 x 2400 Pixels (~424 PPI)   6.7 Inches   1080 x 2340 Pixels (~384 PPI)  
Protection Corning Gorilla Glass Victus   Corning Gorilla Glass Victus+, Mohs level 5  
Memory 128/256GB Built-in, 8GB RAM, UFS 3.1   256GB Built-in, 12GB RAM, UFS  
Card slot No   No  
GPRS Yes
WLAN Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot   Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band or tri-band, Wi-Fi Direct  
BlueTooth v5.0 with A2DP, LE   v6.0 with A2DP, LE  
USB USB Type-C 3.2, USB On-The-Go   USB Type-C 2.0, OTG  
NFC Yes   Yes  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO   Yes + GPS, GLONASS, GALILEO, BDS, QZSS  
Main Camera Geo-tagging, touch focus, face/smile detection, Auto HDR, panorama, Video ([email protected], [email protected]/60fps, [email protected]/60/120fps, [email protected], HDR10+, stereo sound rec., gyro-EIS & OIS)   Triple Camera: 50 MP, f/1.8, (wide), 1/1.56", PDAF, OIS + 12 MP, f/2.2, (ultrawide), 1/3.06", 5 MP, f/2.4, (macro), LED Flash   Best Face, panorama, HDR, Video (4K@30fps, 1080p@30/60fps, HDR, gyro-EIS)  
Front Camera 10 MP, f/2.2, 26mm (wide), 1/3.24   12 MP, f/2.2, (wide), 1/3.2", Video (4K@30fps, 1080p@30/60fps, 10-bit HDR)  
OS Android 11 OS   Android 16 OS, up to 6 major Android upgrades  
Chipset Exynos 2100 (5 nm)   Exynos 1680 (4 nm)  
Processor Octa-core (1 x 2.9 GHz Cortex-X1 + 3 x 2.80 GHz Cortex-A78 + 4 x 2.2 GHz Cortex-A55)   Octa-core (1 x 2.9 GHz Cortex-720 + 4 x 2.6 GHz Cortex-720 + 3 x 1.95 GHz Cortex-520)  
GPU Mali-G78 MP14   Xclipse 550  
Sensors Accelerometer, Barometer, Compass, Fingerprint (under display, ultrasonic), Gyro, Proximity, SpO2   Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity, Virtual proximity sensing  
Browser HTML5   HTML5  
Sound 32-bit/384kHz audio, MP4/DivX/XviD/WMV/H.265 player, MP3/WAV/WMA/eAAC+/FLAC player, Speaker Phone   Speaker  Phone  
Colors Phantom Gray, Phantom White, Phantom Violet, Phantom Pink   Navy, Gray, Icyblue, Lilac  
Battery - Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W   5000 mAh   - Fast charging 45W wired  
Misc Glass front + Gorilla Glass Victus), Plastic back, Aluminum frame, Stylus support, Tuned by AKG, Active noise cancellation with dedicated mic, ANT+, Bixby natural language commands and dictation, Samsung DeX, Samsung Wireless DeX (desktop experience support), Samsung Pay (Visa, MasterCard certified), IP68 dust/water resistant (up to 1.5m for 30 mins), Document viewer, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   NFC (market/region dependent), Glass front+ Gorilla Glass Victus+), Aluminum frame, glass back (Gorilla Glass Victus+), IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)