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                                        BenQ-Siemens EF81 | 
                                    
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| 
                                         Launch 
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| Announced | 2006, January | |
| Status | Discontinued | |
| 
                                         Network 
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| Technology | GSM / UMTS | |
| 2G | GSM 900 / 1800 / 1900 | |
| 3G | UMTS 2100 | |
| Speed | Yes, 384 kbps | |
| GPRS | Class 10 | |
| Edge | No | |
| 
                                         Body 
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| Dimensions | 94 x 51 x 15.9 mm (3.70 x 2.01 x 0.63 in) | |
| Weight | 110 g (3.88 oz) | |
| SIM | Mini-SIM | |
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                                         Display 
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| Type | TFT, 256K colors | |
| Size | 2.2 inches, 34 x 45 mm (~31.3% screen-to-body ratio) | |
| Resolution | 240 x 320 pixels (~182 ppi pixel density) | |
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                                         Memory 
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| Card Slot | microSD, up to 1 GB (dedicated slot) | |
| Internal | 64 MB | |
| 
                                         Camera 
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| Primary | 2 MP, rotating lens | |
| Features | Video-calling | |
| Video | Yes | |
| Secondary | No | |
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                                         Sound 
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| Alert types | Vibration; Downloadable polyphonic, AAC ringtones | |
| Loudspeaker | No | |
| 3.5mm Jack | No | |
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                                         Comms 
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| WLAN | No | |
| Bluetooth | Yes | |
| GPS | No | |
| Radio | No | |
| USB | Yes | |
| 
                                         Features 
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| Messaging | SMS, MMS, Email | |
| Browser | WAP 2.0/xHTML, HTML | |
| Java | Yes, MIDP 2.0 | |
| 
                                         Battery 
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| Battery | Removable Li-Ion 950 mAh battery | |
| Stand-by | Up to 300 h | |
| Talk time | Up to 4 h 30 min | |
| 
                                         Misc 
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| Colors | Titanium Silver | |