| Local Name | 3720 classic |
| Technology | GSM |
| 2G Bands | GSM 900 / 1800 / 1900 |
| GPRS | Class 11 |
| EDGE | Class 11 |
| Announced | 2009, July |
| Status | Available. Released 2009, September |
| Dimensions | 115 x 47 x 15.3 mm, 69 cc (4.53 x 1.85 x 0.60 in) |
| Weight | 94 g (3.32 oz) |
| SIM | Mini-SIM |
| Body | IP54 certified - dust and splash resistant - Flashlight |
| Display Type | TFT, 16M colors |
| Screen Size | 2.2 inches (~27.7% screen-to-body ratio) |
| Resolution | 240 x 320 pixels (~182 ppi pixel density) |
| Card Slot | microSD, up to 8 GB, 1 GB included |
| Phone Book | 2000 entries, Photocall |
| Call Records | 20 dialed, 20 received, 20 missed calls |
| Internal Memory | 20 MB |
| Primary Camera | 2 MP, 1600 x 1200 pixels, LED flash |
| Video | QCIF@15fps |
| Secondary Camera | No |
| Alert Types | Vibration; Downloadable polyphonic, MP3 ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | No |
| Sound | 2.5 mm audio jack |
| WLAN | No |
| Bluetooth | v2.1, A2DP |
| GPS | No |
| Radio | Stereo FM radio with RDS |
| USB | microUSB v2.0 |
| Messaging | SMS, MMS, Email |
| Browser | WAP 2.0/xHTML, HTML, Adobe Flash Lite |
| Games | Yes |
| Java | Yes, MIDP 2.1 |
| Features Summary | MP3/eAAC+/WAV/WMA player, MP4/H.264 player, Voice memo, Predictive text input |
| Battery | Li-Ion 1050 mAh battery (BL-5CT) |
| Stand By | Up to 408 h |
| Talk Time | Up to 7 h |
| Music Play | Up to 14 h 30 min |
| Colors | Gray, Yellow |
| SAR US | 0.40 W/kg (head) 0.41 W/kg (body) |
| SAR EU | 0.48 W/kg (head) |
