| Physical features | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Model | Sidekick 4G (SGH-T839) | Find 7 (X9070) |
| Other model names | T-Mobile Sidekick 4G T839, Samsung SGH-T839 Sidekick 4G | Oppo Find 7 QHD (China Unicom), Oppo Find 7 X9070 |
| Country or region available | 
USA | 
China |
| Brand | T-Mobile | Oppo |
| Release date | April, 2011 | April, 2014 |
| Depth | 15 millimeters (0.59 inches) | 9.2 millimeters (0.36 inches) |
| Size (width x height) | 61 x 127 millimeters (2.4 x 5 in) | 75 x 152.6 millimeters (2.95 x 6.01 in) |
| Weight | 162 grams (5.67 ounces) | 171 grams (5.99 ounces) |
| Qwerty physical keyboard | Retractable QWERTY keyboard | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | feature not registered | feature not registered |
| Protection against water and others | Not supported | Not supported |
| System (OS) | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Operating system | Android 2.2.1 Froyo | Android 4.3 Jelly Bean |
| Firmware update | feature not registered | feature not registered |
| Hardware | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Chipset | 32bit - Samsung Exynos 3 | 32bit - Qualcomm Snapdragon 801 MSM8974-AC (28nm) |
| CPU processor | 1Ghz Single-Core ARM Cortex-A8 | 2.5Ghz Quad-Core Krait 400 |
| GPU graphical controller | PowerVR SGX540 | Qualcomm Adreno 330 578Mhz |
| RAM memory | 512MB | 3GB LPDDR3 |
| Internal storage | 1GB (350MB available) | 32GB (25GB available) |
| External storage | Until 32GB microSD, microSDHC
(dedicated slot) | Until 128GB microSD, microSDXC
(dedicated slot) |
| Display | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Display type | TFT LCD | TFT IPS LCD |
| Screen size | 3.5" inches | 5.5" inches |
| Screen-to-body ratio | ~45% (screen-to-body ratio) | ~72.9% (screen-to-body ratio) |
| Display resolution | 480x800 pixels | 1440x2560 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 267 PPI | 534 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass 3 |
| Display features | feature not registered | feature not registered |
| Mobile networks | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM)
Standard mini-SIM (2FF) | 1 slot (Single-SIM)
micro-SIM (3FF) |
| Maximum download/upload | 21/5.76 Mbps | 100/50 Mbps |
| Network technology | 2G, 3G | 2G, 3G, 4G |
| 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 | UMTS 1700/2100 | TD-SCDMA 1900/2000
UMTS 850/900/1900/2100 |
| Primary 4G network | Not supported | LTE Cat3 1800/2100/2600 (Bands 1,3,7) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ | GPRS, EDGE, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
| Calling | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Messaging | SMS (T9), MMS, E-mail, Push 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 | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Back camera (main camera) | 3.1 megapixels | 13 megapixels |
| Main camera resolution | 2048x1536 pixels | 4128x3096 pixels |
| Video recording (primary) | VGA (720x480) 30 fps | 4K UHD (3840x2160) 30 fps |
| Flash | Not supported | Dual-LED flash |
| Focal aperture | feature not registered | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/3" inches |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Autofocus | Autofocus |
| Touch focus | feature not registered | Supported |
| Image stabilization | feature not registered | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | feature not registered | Face detection, Smile detection |
| BSI sensor | feature not registered | Supported |
| HDR | feature not registered | HDR photo/video only main camera |
| 2ª camera | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Front camera (secondary) | 0.3 megapixels | 5 megapixels |
| Front camera resolution | 640x480 pixels | 2592x1944 pixels |
| Video recording (secondary) | Not supported | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Multimedia | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | MP4, H.264, H.263, WMV |
| Audio formats | MP3, WAV, eAAC+ | MP3, WAV, WMA, eAAC+ |
| Connectivity | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| USB | MicroUSB 2.0 | MicroUSB 2.0 |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 3.0 + A2DP | 4.0 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO |
| DLNA | feature not registered | Supported |
| NFC | Not supported | Supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging |
| Infrared port | feature not registered | Not supported |
| Other functions | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Active noise cancellation | feature not registered | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, Flash player | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Ambient Light sensor
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
|
| Other features | - Colors: Matte black, Pearl magenta
- 2GB microSD included
- Samsung TouchWiz UI
- Optical trackpad
- HAC M3/T3
- T-Mobile TV
- DLNA
- WiFi hotspot
- Java framework | - Colors: Black, White
- ColorOS UI
- LED notification light
- USB On-The-Go 1.3
- 720p slow motion video 120fps
- Oppo MaxxAudio sound enhancement
- WiFi display
- WiFi direct
- WiFi hotspot
- Support for gloved and wet touch
- Rapid Charge battery |
| Power supply | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| Battery | Li-Ion: Lithium-Ion (Removable) | LiPo: Li-Ion polymer (Removable)
BLP575 |
| Battery capacity | 1500 mAh | 3000 mAh |
| Charger, watts | Standard charging | Standard charging |
| Talk time autonomy | 390 minutes | 6.5 hours | 0.3 day | feature not registered |
| Standby | 27360 minutes | 456 hours | 19 days | feature not registered |
| Radiation rate | T-Mobile Sidekick 4G (SGH-T839) | Oppo Find 7 (X9070) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |