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Samsung Galaxy S21 Ultra vs Samsung Galaxy Z Fold 4 12GB

2G Network SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900   SIM1: 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   Folded: (155.1 x 67.1 x 15.8 mm), Unfolded: (155.1 x 130.1 x 6.3 mm)  
Sim Type Dual Sim, Dual Standby, eSIM (Nano-SIM)   eSIM (Nano-SIM)  
Weight 227 g   263 g  
Display Type Always-on display, 120Hz, HDR10+, 1500 nits (peak)   Foldable Dynamic AMOLED 2X Capacitive Touchscreen, Multitouch   120Hz, Cover display: Dynamic AMOLED 2X, 6.2 inches, 904 x 2316 pixels, 120Hz, 25:9 ratio, 120Hz, Corning Gorilla Glass Victus+  
Display Size 1440 x 3200 Pixels (~516 PPI)   7.6 Inches   1812 x 2176 Pixels (~373 PPI)  
Protection Corning Gorilla Glass Victus   Corning Gorilla Glass Victus+  
Memory 256GB Built-in, 12GB RAM   512GB 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, USB On-The-Go  
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)   Triple Camera: 50 MP, f/1.8, (wide), Dual Pixel PDAF, OIS + 10 MP, f/2.4, (telephoto), 1.0µm, PDAF, OIS, 3x optical zoom + 12 MP, f/2.2, 12mm (ultrawide), LED Flash   Geo-tagging, touch focus, HDR, panorama, Video (4K@60fps, 1080p@60/240fps (gyro-EIS), 720p@960fps (gyro-EIS), HDR10+)  
Front Camera 40 MP, f/2.2, 26mm (wide), 1/2.8   Cover Camera: 10 MP, f/2.2, 26mm (wide), 1/3.24", HDR, Video (4K@30fps, 1080p@30fps, gyro-EIS) + under display: 4 MP, f/1.8, 26mm (wide)  
OS Android 11 OS   Android 12 OS  
Chipset Exynos 2100 (5 nm)   Qualcomm SM8475 Snapdragon 8+ Gen 1 (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)   3.19Ghz Octa Core  
GPU Mali-G78 MP14   Adreno 670  
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   Graygreen, Phantom Black, Beige, Burgundy  
Battery - Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W   (Li-Po Non removable), 4400 mAh   - Fast charging 25W, Fast wireless charging 15W, 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   SMS(threaded view), MMS, Email, Push Mail, IM   Glass front + Gorilla Glass Victus+) (folded), Plastic front (unfolded), glass back + Gorilla Glass Victus+), Aluminum frame, IPX8 water resistant (up to 1.5m for 30 mins), Armour aluminum frame with tougher drop and scratch resistance (advertised), Stylus support, Active noise cancellation with dedicated mic, Document viewer, Photo video/editor