| Local Name | Galaxy S II I777 |
| Additional Information | For AT&T Also known as Samsung SGH-I777, Samsung Attain |
| Technology | GSM / HSPA |
| 3G Bands | HSDPA 850 / 1900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | HSPA 21.1/5.76 Mbps |
| GPRS | Class 12 |
| EDGE | Class 12 |
| Announced | 2011, August |
| Status | Available. Released 2011, October |
| Dimensions | 126 x 66 x 8.9 mm (4.96 x 2.60 x 0.35 in) |
| Weight | 121.9 g (4.27 oz) |
| SIM | Mini-SIM |
| Display Type | Super AMOLED Plus capacitive touchscreen, 16M colors |
| Screen Size | 4.3 inches (~63.3% screen-to-body ratio) |
| Resolution | 480 x 800 pixels (~217 ppi pixel density) |
| Mulitouch | Yes |
| Protection | Corning Gorilla Glass | TouchWiz UI v4.0 |
| OS | Android OS, v2.3.4 (Gingerbread) |
| Chipset | Exynos C210 |
| CPU | Dual-core 1.2 GHz Cortex-A9 |
| GPU | Mali-400 |
| Card Slot | microSD, up to 32 GB, 8 GB included |
| Internal Memory | 16/32 GB, 1 GB RAM |
| Primary Camera | 8 MP, 3264 x 2448 pixels, autofocus, LED flash |
| Camera Features | Geo-tagging, touch focus, face/smile detection |
| Video | 1080p@30fps |
| Secondary Camera | 2 MP |
| Alert Types | Vibration; MP3, WAV ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, hotspot |
| Bluetooth | v3.0, A2DP, apt-X |
| GPS | Yes, with A-GPS |
| NFC | Optional |
| Radio | No |
| USB | microUSB v2.0 (MHL TV-out), USB Host |
| Sensors | Accelerometer, gyro, proximity, compass |
| Messaging | SMS(threaded view), MMS, Email, Push Mail, IM |
| Browser | HTML, Adobe Flash |
| Java | Yes, via Java MIDP emulator |
| Features Summary | Active noise cancellation with dedicated mic, MP4/DivX/XviD/WMV/H.264 player, MP3/WAV/eAAC+/AC3/FLAC player, Photo/video editor, Document editor |
| Battery | Li-Ion 1650 mAh battery |
| Stand By | Up to 400 h |
| Talk Time | Up to 8 h |
| Colors | Black |
| SAR US | 0.36 W/kg (head) 0.90 W/kg (body) |
| SAR EU | 0.25 W/kg (head) |
