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Samsung Galaxy S21 Ultra vs Samsung Galaxy Z Fold 3

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  
5G Network 5G SA/NSA   SA/NSA/Sub6  
Dimensions 165.1 x 75.6 x 8.9 mm   unfolded: (158.2 x 128.1 x 6.4 mm) Folded: (67.1 x 158.2 x 16.0mm)  
Sim Type Dual Sim, Dual Standby, eSIM (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 227 g   271 g  
Display Type Always-on display, 120Hz, HDR10+, 1500 nits (peak)   120Hz, HDR10+, 1200 nits (peak), Cover display: Dynamic AMOLED 2X, 6.2 inches, 832 x 2268 pixels, 120Hz, 25:9 ratio, 120Hz, Corning Gorilla Glass Victus  
Display Size 1440 x 3200 Pixels (~516 PPI)   1768 x 2208 Pixels (~372 PPI)  
Protection Corning Gorilla Glass Victus   Corning Gorilla Glass Victus  
Memory 256GB Built-in, 12GB RAM   256GB Built-in, 12GB RAM, UFS 3.1  
Card slot No   No  
GPRS Yes 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, Wi-Fi Direct, hotspot  
BlueTooth v5.2 with A2DP, LE   v5.2 with A2DP, LE, apt-X HD  
USB USB Type-C 3.2, USB On-The-Go   USB Type-C 3.2  
NFC Yes   Yes  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO   Yes + AGPS, GLONASS, BDS, GALILEO  
Main Camera Geo-tagging, touch focus, face/smile detection, Auto HDR, panorama, Video ([email protected], [email protected]/60fps, [email protected]/60/240fps, [email protected], HDR10+, stereo sound rec., Gyro-EIS)   Geo-tagging, touch focus, HDR, panorama, Video ([email protected], [email protected]/240fps (gyro-EIS), [email protected] (gyro-EIS), HDR10+)  
Front Camera 40 MP, f/2.2, 26mm (wide), 1/2.8   Under display camera: 4 MP F/1.8 + Cover camera: 10 MP, f/2.2, 26mm (wide), 1/3", HDR, Video ([email protected], [email protected], gyro-EIS)  
OS Android 11 OS   Android 11 OS  
Chipset Exynos 2100 (5 nm)   Qualcomm SM8350 Snapdragon 888 5G (5 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 2.84 GHz Kryo 680 + 3 x 2.42 GHz Kryo 680 + 4 x 1.80 GHz Kryo 680)  
GPU Mali-G78 MP14   Adreno 660  
Sensors Accelerometer, Barometer, Compass, Fingerprint (under display, ultrasonic), Gyro, Proximity   Accelerometer, Barometer, Compass, Fingerprint (side mounted), Gyro, Proximity  
Browser HTML5   HTML5  
Sound 32-bit/384kHz audio, MP4/DivX/XviD/WMV/H.265 player, MP3/WAV/WMA/eAAC+/FLAC player, Speaker Phone   32-bit/384kHz audio Tuned by AKG, Speaker Phone  
Colors Phantom Black, Phantom Silver   Black; other colors  
Battery - Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W   - Fast charging 25W, Fast wireless charging 10W, Reverse wireless charging 4.5W  
Misc Glass front + Gorilla Glass Victus), Glass back (Gorilla Glass), Aluminum frame, Active noise cancellation with dedicated mic, Samsung Pay (Visa, MasterCard certified), IP68 dust/water resistant (up to 1.5m for 30 mins), Stylus support, Samsung DeX, Samsung Wireless DeX (desktop experience support), ANT+, Bixby natural language commands and dictation, Document viewer, Photo/video editor   Glass front + Gorilla Glass Victus) (folded), Plastic front (Unfolded), Glass back + Gorilla Glass Victus), Aluminum frame, Stylus support, IPX8 water resistant (up to 1.5m for 30 mins), Bixby natural language commands and dictation, Samsung DeX (desktop experience support), Samsung Pay (Visa, MasterCard certified), Ultra Wideband (UWB) support, Active noise cancellation with dedicated mic, Document viewer, Photo video/editor