SED 688
| Type | Clamshell |
| Dimensions | 77.00 x 42.20 x 23.90 mm |
| Weight | 81.00 g |
| Display size | - |
| Display | Color / LCD |
| Display protection |   |
| Additional display | Mono / LCD |
| Protection of the secondary display | |
| Talk time (max.) | 2G: 300 min. (5.0 h) |
| Stand-by (max.) | 2G: 100 h. (4.2 days) |
| Quick battery charging | |
| Wireless battery charging | |
| Phonebook memory | 500 places |
| DualSIM | |
| Other names | - |
| GSM frequencies | 900 1800 |
| UMTS | |
| LTE standard | |
| CDMA | |
| Standard TD-SCDMA | |
| UMA | |
CAMERAS - BACK
| First camera |  |
| Photo matrix | 1.1 Mpx |
| Optical zoom | |
| Flash | |
| Dual-colour LED flash | |
| Additional | - |
CAMERAS - FRONT
SENSORS
| Accelerometer | |
| Proximity | |
| Light | |
| Magnetometer | |
| Gyroscope | |
| Barometer | |
| Altimeter | |
| Gravity | |
| Hall-effect | |
| Iris scanner | |
| Fingerprint scanner | |
| Thermometer | |
| Hygrometer | |
Data transfer
| WAP | |
| HSUPA | |
| HSPA | |
| HSPA+ | |
| LTE DL | |
| LTE UP | |
| WIMAX+ | |
| GPRS | |
| HDMI | |
| WiFi | |
| WiFi frequencies | |
| WiFi Direct | |
| WiFi Display | |
| DLNA | |
| Miracast | |
| WiFi hotspot | |
| USB | |
| Beidou | |
| NFC | |
COMMUNICATION AND MESSAGING
| Instant Messenger | |
| SMS | |
| Swype | |
| Hardware QWERTY keyboard | |
| RSS Reader | |
Multimedia
| Stereo speakers | |
| Audio Jack | |
| HD Voice | |
| Polyphony | 40 voices |
| Games | |
| Videophone | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | |
| Stopwatch | |
| Alarm | |
| Calculator | |
| Organizer | |
| Calendar | |
| Flight mode | |