Samsung Rex 60 (C3312R) vs Samsung Galaxy S21 Ultra (SM-G998U1 256GB)
Side by side comparison between Samsung Rex 60 vs Samsung Galaxy S21 Ultra phones, differences, pros, cons and full specifications. What's the better?
,
vs
6.8"
AMOLED
AMOLED
1440x3200
108
MP
MP
40mp
12GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 Ultra (SM-G998U1 256GB)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
4 Advantages 
43 Advantages | 4 Common items in both devices |
| Proximity sensor |
| Hands-free calling |
| Vibrating alert |
| FM |
| + specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Change model | ||
| Model | Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) |
| Other model names | Samsung Rex 60 Duos C3312R for India market | Galaxy S21 Ultra 5G (SM-G998U1) Unlocked |
| Country or region available |  India |  USA |
| Brand | Samsung | Samsung |
| Release date | 3/1/2013 | 1/29/2021, Announced: 1/14/2021 |
| Depth | 12.2 millimeters (0.48 inches) | 8.9 millimeters (0.35 inches) |
| Size (width x height) | 55 x 101.8 millimeters (2.17 x 4.01 in) | 75.6 x 165.1 millimeters (2.98 x 6.5 in) |
| Weight | 90 grams (3.15 ounces) | 227 grams (7.95 ounces) |
| Build, materials | feature not registered | Aluminum frame, glass front/back |
| Protection against water and others | Not supported | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Display type | TFT LCD | Dynamic AMOLED |
| Screen size | 2.8" inches | 6.8" inches |
| Screen-to-body ratio | ~43.4% (screen-to-body ratio) | ~89.4% (screen-to-body ratio) |
| Display resolution | 240x320 pixels | 1440x3200 pixels (20:9) |
| Touchscreen | Resistive Single touch 1-point | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 143 PPI | 516 PPI |
| Colors | 65 thousand | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass Victus |
| Refresh rate | feature not registered | 120Hz |
| Display features | feature not registered | 1500nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| System version | Proprietary OS | Android 11 |
| Firmware update | feature not registered | Android 15 |
| User Interface | feature not registered | One UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0 |
⚙️ Processor | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Chipset | 32bit | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) |
| CPU | Single-core, 1 processor: Single-core XMM 2150 (Single-core) | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) |
| GPU graphical controller | feature not registered | Qualcomm Adreno 660 (840MHz) |
| Performance (benchmark) | feature not registered | AnTuTu: 681099 (v8), 809165 (v9) Geekbench: 3539 (v5.2) GFXBench: 54fps (ES 3.1 onscreen) |
💽 Memory and storage | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| RAM memory | feature not registered | 12GB LPDDR5 |
| Internal storage | 30MB | 256GB (220GB available) UFS 3.1 |
| External storage | Until 16GB microSD, microSDHC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (dedicated slot) | Dual-SIM Standby - Call active on one sim card |
| SIM card | 2 slots (Dual-SIM) Standard mini-SIM (2FF) | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM |
| Maximum Download / Upload | 0.236 Mbps | 5000/1920 Mbps |
| Network technology | 2G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | CDMA 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | Not supported | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 |
| Primary 4G network | Not supported | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE |
| Primary 5G network | Not supported | SA/NSA/Sub6 (2, 5, 25, 41, 66, 71) mmWave (260, 261) |
| Primary data network | GPRS, EDGE | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 |
| Secondary 2G network | GSM 850/900/1800/1900 | CDMA 800/1900, GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 |
| Secondary 4G network | Not supported | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE |
| Secondary data network | GPRS | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 |
📷 Camera | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Back camera (main camera) | 1.3 megapixels | (quad camera) 108 megapixels 10MP periscope telephoto f/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom 10MP telephoto f/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video |
| Main camera resolution | 1280x1024 pixels | 12000x9000 pixels |
| Video recording (primary) | Supported | 8K UHD (7680x4320) 24 fps |
| Flash | Not supported | LED flash |
| Focal aperture | feature not registered | f/1.8 (aperture) |
| Focal length | feature not registered | 26mm (lens) |
| Sensor size | feature not registered | 1/1.33" inches |
| Pixel size | feature not registered | 1.8µm pixel |
| Autofocus | Not supported | PDAF: phase detection autofocus on both cameras |
| Touch focus | Not supported | Supported |
| Image stabilization | Not supported | OIS: Optical stabilization |
| Zoom | Only digital zoom | Digital and optical zoom |
| Face/smile detection | Not supported | Face detection, Smile detection |
| BSI sensor | Not supported | Supported |
| HDR | Not supported | HDR photo/video on both cameras |
| Camera extras | feature not registered | 4K@60fps 1080p@240fps 720p@960fps |
📸 Front camera | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Front camera (secondary) | Not supported | 40 megapixels |
| Front camera resolution | Not supported | 7296x5472 pixels |
| Video recording (secondary) | Not supported | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | f/2.2 (aperture) |
| Focal length | feature not registered | 26mm (lens) |
| Sensor size | feature not registered | 1/2.8" inches |
| Pixel size | feature not registered | 0.7µm pixel |
🔉 Sound and multimedia | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Loudspeaker | Supported | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG |
| Active noise cancellation | Not supported | 3 microphones |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.263 | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, eAAC+ | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| USB | MicroUSB 2.0 | USB 3.2 Type-C, USB OTG On-The-Go |
| Audio output | 3.5mm jack | Type-C reversible connector |
| TV output | Not supported | USB Type-C (reversible) |
| Bluetooth | 3.0 | 5.2 + A2DP/LE |
| WiFi | Not supported | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | Not supported | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Sensors | Proximity sensor | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband) |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Battery type | Li-Ion: lithium-ion (Removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 1000 mAh | 5000 mAh |
| Charger, watts | Wired charging | 25W Wired fast charging USB Power Delivery 3.0 |
| Inductive / wireless charging | feature not registered | 15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging |
| Talk time autonomy | 15 hours | feature not registered |
| Standby | 490 hours (20.4 days) | feature not registered |
➕ Other features | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| Call control | Voice recorder | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS, MMS, E-mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Not supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: White, Gray, Blue • Samsung TouchWiz Lite UI 2.0 • ChatON • Opera browser • Facebook, Twitter, YouTube • Java framework | • Colors: Phantom Black, Silver, Titanium, Navy, Brown • Samsung Pay (Visa, MasterCard) • Samsung DeX • Stylus pen support |
☢️ Radiation rate | ||
| Samsung Rex 60 (C3312R) | Galaxy S21 Ultra (SM-G998U1 256GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.77W/kg (head), 1.02W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |