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Samsung Galaxy S21 Ultra vs Xiaomi Poco X7 Pro

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), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
5G Network 5G SA/NSA   SA/NSA/Sub6  
Dimensions 165.1 x 75.6 x 8.9 mm   160.8 x 75.2 x 8.3 mm  
Sim Type Dual Sim, Dual Standby, eSIM (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 227 g   195 g  
Display Type Always-on display, 120Hz, HDR10+, 1500 nits (peak)   AMOLED Capacitive Touchscreen, 68B Colors   120Hz, Dolby Vision, HDR10+, 1400 nits (HBM), 3200 nits (peak)  
Display Size 1440 x 3200 Pixels (~516 PPI)   6.67 Inches   1220 x 2712 Pixels (~446 PPI)  
Protection Corning Gorilla Glass Victus   Corning Gorilla Glass 7i  
Memory 256GB Built-in, 12GB RAM   512GB Built-in, 12GB RAM, UFS 4.0  
Card slot No   microSDXC (uses shared SIM slot)  
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/6, dual-band, Wi-Fi Direct  
BlueTooth v5.2 with A2DP, LE   v5.4/6.0 with A2DP, LE, apt-X HD  
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   A-GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), NavIC (L5)  
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)   Dual Camera: 50 MP, f/1.5, 26mm (wide), 1/1.95", PDAF, OIS + 8 MP, f/2.2, 15mm (ultrawide), 1/4.0", LED Flash   HDR, panorama, Video (4K@24/30/60fps, 1080p@30/60/120/240/960fps, HDR10+, gyro-EIS, OIS)  
Front Camera 40 MP, f/2.2, 26mm (wide), 1/2.8   20 MP, f/2.2, 25mm (wide), 1/4.0", Video (1080p@30/60fps)  
OS Android 11 OS   Android 15 OS  
Chipset Exynos 2100 (5 nm)   Mediatek Dimensity 8400 Ultra (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 3.25 GHz Cortex-A725 + 3 x 3.0 GHz Cortex-A725 + 4 x 2.1 GHz Cortex-A725)  
GPU Mali-G78 MP14   Mali-G720 MC7  
Sensors Accelerometer, Barometer, Compass, Fingerprint (under display, ultrasonic), Gyro, Proximity   Accelerometer, Compass, Fingerprint (under display, optical), 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   24-bit/192kHz Hi-Res & Hi-Res Wireless audio, Speaker  Phone  
Colors Phantom Black, Phantom Silver   Black/Yellow, White, Green, Red (Iron Man Edition)  
Battery - Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W   (Non removable), 6000 mAh   - Fast battery 90W wired, PD3.0, QC3+, 100% in 42 min  
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   NFC (market/region dependent), IP64, dust and splash resistant, Photo/video editor, Document viewer