| Local Name | OT-660 |
| Additional Information | Also known as T-Mobile E100 |
| Technology | GSM |
| 2G Bands | GSM 900 / 1800 | GSM 850 / 1900 |
| GPRS | Class 10 |
| EDGE | No |
| Announced | 2009, June. Released 2009 |
| Status | Discontinued |
| Dimensions | 94.3 x 46.2 x 19.4 mm (3.71 x 1.82 x 0.76 in) |
| Weight | 82 g (2.89 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 65K colors |
| Screen Size | 1.8 inches (~23.4% screen-to-body ratio) |
| Resolution | 128 x 160 pixels (~114 ppi pixel density) |
| Card Slot | microSD, up to 2 GB |
| Phone Book | 800 entries |
| Call Records | 20 dialed, 20 received, 20 missed calls |
| Internal Memory | 10 MB |
| Primary Camera | 1.3 MP, 1280 x 1024 pixels |
| Video | Yes |
| Secondary Camera | No |
| Alert Types | Vibration; Polyphonic(64) ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | v2.0, A2DP |
| GPS | No |
| Radio | Stereo FM radio with RDS |
| USB | microUSB v2.0 |
| Messaging | SMS, MMS |
| Browser | WAP 2.0/xHTML |
| Games | 2 |
| Java | Yes, MIDP 2.0 |
| Features Summary | MP3/AAC+ player, Organizer, Predictive text input |
| Battery | Li-Ion 750 mAh battery |
| Stand By | Up to 400 h |
| Talk Time | Up to 10 h |
| Music Play | Up to 15 h |
| Colors | Dark Chrome, Pink Chrome |
| SAR US | 1.16 W/kg (head) 1.13 W/kg (body) |
| SAR EU | 1.00 W/kg (head) |
