| Local Name | OT-S621 |
| Technology | GSM |
| 2G Bands | GSM 900 / 1800 |
| GPRS | Class 10 |
| EDGE | No |
| Announced | 2008, February. Released 2008, July |
| Status | Discontinued |
| Dimensions | 103.5 x 44.9 x 10.9 mm (4.07 x 1.77 x 0.43 in) |
| Weight | 69 g (2.43 oz) |
| SIM | Mini-SIM |
| Display Type | STN, 65K colors |
| Screen Size | 1.8 inches (~21.9% screen-to-body ratio) |
| Resolution | 128 x 160 pixels (~114 ppi pixel density) |
| Card Slot | microSD |
| 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), MP3 ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | v2.0, A2DP |
| GPS | No |
| Radio | No |
| USB | Yes |
| Messaging | SMS, MMS, Email |
| Browser | WAP 2.0/xHTML |
| Games | 2 |
| Java | Yes, MIDP 2.0 |
| Features Summary | MP3/AAC player, Predictive text input, Organizer |
| Battery | Li-Ion 750 mAh battery |
| Stand By | Up to 400 h |
| Talk Time | Up to 10 h |
| Colors | Dark Chrome |
| SAR EU | 1.00 W/kg (head) |
