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Realme C33 vs Samsung Galaxy S25 Ultra 512GB

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 / 1700(AWS) / 1900 / 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), 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)  
5G Network SA/NSA/Sub6  
Dimensions 164.2 x 75.7 x 8.3 mm   162.8 x 77.6 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)  
Weight 187 g   219 g  
Display Type IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   120Hz   Dynamic LTPO AMOLED 2X Capacitive Touchscreen   120Hz, HDR10+, 2600 nits (peak), Always-on display  
Display Size 6.5 Inches   720 x 1600 Pixels (~270 PPI)   6.9 Inches   1440 x 3120 Pixels (~498 PPI)  
Protection Corning Gorilla Armor 2  
Memory 32/64/128GB Built-in, 3/4GB RAM, UFS 2.2   512GB Built-in, 12GB RAM, UFS 4.0  
Card slot microSDXC (dedicated slot)   No  
GPRS Yes
WLAN Wi-Fi 802.11 b/g/n, hotspot   Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct  
BlueTooth v5.0 with A2DP, LE   v5.4 with A2DP, LE  
USB microUSB 2.0   USB Type-C 3.2, DisplayPort 1.2, OTG  
NFC No   Yes  
GPS Yes + A-GPS support, & GLONASS, BDS   Yes + A-GPS support & GLONASS, BDS, GALILEO, QZSS  
Main Camera Dual Camera: 50 MP, f/1.8, 26mm (wide), 1/2.76", PDAF + 0.3 MP, f/2.8, (depth), LED Flash   Geo-tagging, Phase detection, touch focus, Panorama, HDR, Video (1080p@30fps)   Quad Camera: 200 MP, f/1.7, 24mm (wide), 1/1.3", multi-directional PDAF, OIS + 10 MP, f/2.4, 67mm (telephoto), 1/3.52", PDAF, OIS, 3x optical zoom + 50 MP, f/3.4, 111mm (periscope telephoto), 1/2.52", PDAF, OIS, 5x optical zoom + 50 MP, f/1.9, (ultrawide), dual pixel PDAF, Super Steady video, LED Flash   Laser AF, Best Face, auto-HDR, panorama, Video (8K@24/30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS)  
Front Camera 5 MP, f/2.2, 27mm (wide), 1/5.0", HDR, Video (720p@30fps)   12 MP, f/2.2, 26mm (wide), 1/3.2", dual pixel PDAF, HDR, HDR10+, Video (4K@30/60fps, 1080p@30fps)  
OS Android 12 OS   Android 15 OS, up to 7 major Android upgrades  
Chipset Unisoc Tiger T612 (12 nm)   Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm)  
Processor Octa core (2 x 1.8 GHz Cortex A75 + 6 x 1.8 GHz Cortex A55)   Octa-core (2 x 4.47 GHz Oryon V2 Phoenix L + 6 x 3.53 GHz Oryon V2 Phoenix M)  
GPU Mali-G52 MP2   Adreno 830  
Sensors Accelerometer, Compass, Fingerprint (side mounted)   Accelerometer, Barometer, Compass, Fingerprint (under display, ultrasonic), Gyro, Proximity, Samsung DeX, Samsung Wireless DeX (desktop experience support) Ultra Wideband (UWB) support Circle to Search  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, Speaker Phone   32-bit/384kHz audio, Tuned by AKG, Speaker  Phone  
Colors Sandy Gold, Aqua Blue, Night Sea   Titanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink Gold  
Battery (Li-Po Non removable), 5000 mAh   - Battery charging 10W   Li-ion 5000 mAh   - Fast charging 45W wired, PD3.0, 65% in 30 min, 25W wireless (Qi2), 4.5W reverse wireless  
Misc SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, plastic frame, plastic back, Photo/video editor, Document viewer   SMS(threaded view), MMS, Email, Push Mail, IM   Glass front + Corning Gorilla Armor 2), glass back + Corning Gorilla Armor 2), titanium frame (grade 5), IP68 dust/water resistant (up to 1.5m for 30 min), Stylus