| Physical features | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Model | Star II Duos (GT-C6712) | Galaxy S20 Ultra 5G (SM-G988U) |
| Other model names | Samsung Star 2 Duos C6712, Samsung Star Duos 2 | Galaxy S20 Ultra 5G (Snapdragon, 12GB RAM) - US Carriers |
| Country or region available | feature not registered | 
USA |
| Brand | Samsung | Samsung |
| Release date | May, 2011 | March, 2020 |
| Depth | 12.2 millimeters (0.48 inches) | 8.8 millimeters (0.35 inches) |
| Size (width x height) | 56 x 109.5 millimeters (2.2 x 4.31 in) | 76 x 166.9 millimeters (2.99 x 6.57 in) |
| Weight | 100 grams (3.5 ounces) | 222 grams (7.77 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | feature not registered | Aluminum frame, glass front/back |
| Protection against water and others | Not supported | IP68 certified: dust proof and waterproof over 1.5 meter and 30min |
| System (OS) | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Operating system | Proprietary OS | Android 10 |
| Firmware update | feature not registered | feature not registered |
| Hardware | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Chipset | 32bit | 64bit - Qualcomm Snapdragon 865 SM8250 (7nm) |
| CPU processor | Single-Core | Octa-Core, 3 processors:
2.84Ghz Single-Core Kryo 585
2.42Ghz 3-Cores Kryo 585
1.8Ghz Quad-Core Kryo 585 |
| GPU graphical controller | feature not registered | Qualcomm Adreno 650 |
| RAM memory | feature not registered | 12GB LPDDR5 |
| Internal storage | 20MB | 128GB (104GB available)
UFS 3.0 |
| External storage | Until 16GB microSD, microSDHC
(dedicated slot) | Until 1TB microSD, microSDXC
(dedicated slot) |
| Display | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Display type | TFT LCD | Dynamic AMOLED |
| Screen size | 3.2" inches | 6.9" inches |
| Screen-to-body ratio | ~47.5% (screen-to-body ratio) | ~90.6% (screen-to-body ratio) |
| Display resolution | 240x400 pixels | 1440x3200 pixels (20:9) |
| Touchscreen | Capacitive Single touch 1-point | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 146 PPI | 509 PPI |
| Colors | 260 thousand | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass 6 |
| Display features | feature not registered | 120Hz, HDR10+ |
| Mobile networks | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) | Dual-SIM Standby - Call active on one sim card
(dedicated slot) |
| 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 | 5000/200 Mbps |
| Network technology | 2G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | Not supported | 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, 29, 30, 66, 71)
TD-LTE (38, 39, 40, 41, 46, 48)
VoLTE |
| Primary 5G network | Not supported | SA/NSA/Sub6 (2, 5, 41, 66, 71)
mmWave (260, 261) |
| Primary data network | GPRS, EDGE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA, 5G NR |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Messaging | SMS, MMS, E-mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice recorder | Voice dialing, Voice recorder, Voice commands |
| Camera | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Back camera (main camera) | 3.1 megapixels | (quad camera)
108 megapixels
48MP periscope telephotof/3.5103mm1/2.0"0.8µmPDAFOIS4x-optical-zoom10x-hybrid-zoom
12MP ultrawidef/2.213mm1.4µmSuper-Steady-video
0.3MP TOF 3Df/1.0 |
| Main camera resolution | 2048x1536 pixels | 12000x9000 pixels |
| Video recording (primary) | QVGA (320x240) 15 fps | 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 | 0.8µm 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 |
| 2ª camera | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| 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 | feature not registered |
| Pixel size | feature not registered | 0.7µm pixel |
| Multimedia | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Radio | FM (RDS) | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, AAC+ | MP3, WAV, WMA, eAAC+, FLAC |
| Connectivity | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| USB | MicroUSB 2.0 | USB 3.2 Type-C, USB OTG On-The-Go |
| TV output | Not supported | USB Type-C (reversible) |
| Audio output | 3.5mm jack | Type-C reversible connector |
| Bluetooth | 3.0 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 a/b/g/n/ac/ax (2.4Ghz, 5Ghz) Wifi6 + MIMO |
| DLNA | Not supported | Supported |
| NFC | Not supported | Supported |
| GPS | Not supported | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| Infrared port | Not supported | Not supported |
| Other functions | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Active noise cancellation | Not supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Barometer
Gesture
Hall effect
Face unlock
Fingerprint sensor (under display)
ANT+
|
| Other features | - Colors: Black
- Samsung TouchWiz UI 3.0
- Dolphin 2.0 browser
- Facebook, Twitter
- Word, Excel, PowerPoint, PDF viewer
- Java framework | - Colors: Cosmic Black, Cosmic Grey, Cloud White
- Ultrasonic fingerprint sensor
- One UI 2
- Always-on display
- 32-bit/384kHz audio
- Dolby Atmos/AKG sound
- Bixby
- Samsung DeX
- Samsung Pay (MST, NFC)
- WiFi direct, hotspot |
| Power supply | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| Battery | Li-Ion: Lithium-Ion (Removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 1200 mAh | 5000 mAh |
| Charger, watts | Standard charging | 45W Fast battery charging
15W Qi wireless charging (Qi/PMA)
9W Reverse wireless charging between devices
USB Power Delivery 3.0 |
| Talk time autonomy | 600 minutes | 10 hours | 0.4 day | feature not registered |
| Standby | 33000 minutes | 550 hours | 22.9 days | feature not registered |
| Radiation rate | Samsung Star II Duos (GT-C6712) | Samsung Galaxy S20 Ultra 5G (SM-G988U) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.94W/kg (head) | 0.95W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |