| Local Name | A637 |
| Additional Information | For AT&T |
| Technology | GSM / UMTS |
| 3G Bands | UMTS 850 / 1900 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | Yes, 384 kbps |
| GPRS | Class 10 |
| EDGE | Class 10 |
| Announced | 2008, October |
| Status | Discontinued |
| Dimensions | 86 x 43 x 20 mm (3.39 x 1.69 x 0.79 in) |
| Weight | 92 g (3.25 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 256K colors |
| Screen Size | 1.9 inches (~30.9% screen-to-body ratio) |
| Resolution | 144 x 176 pixels (~120 ppi pixel density) | Downloadable wallpapers and tones |
| Card Slot | microSD, up to 8 GB |
| Phone Book | 1000 entries, Photocall |
| Call Records | 30 dialed, 30 received, 30 missed calls |
| Internal Memory | 50 MB |
| Primary Camera | 1.3 MP, 1280 x 1024 pixels |
| Camera Features | Video-calling |
| Video | Yes |
| Secondary Camera | No |
| Alert Types | Vibration; Downloadable polyphonic, MP3 ringtones |
| Loudspeaker | No |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | v2.0, A2DP |
| GPS | No |
| Radio | No |
| USB | Yes |
| Messaging | SMS, EMS, MMS, Email |
| Browser | WAP 2.0/xHTML, HTML |
| Games | Yes + Downloadable |
| Java | Yes, MIDP 2.0 |
| Features Summary | AT&T Navigator, MP3 player, Video player, Organizer, Voice memo, Built-in speakerphone, Predictive text input |
| Battery | Li-Ion 800 mAh battery |
| Stand By | Up to 350 h |
| Talk Time | Up to 4 h |
| Colors | White |
| SAR US | 1.28 W/kg (head) 0.60 W/kg (body) |
