| Brand: | Siemens |
| Model: | AF51 |
| Release Date: | 2005, November |
| Display | |
| Resolution: | 130 x 130 pixels, 1:1 ratio |
| Technology: | CSTN, 65K colors |
| Battery | |
| Capacity: | Removable Li-Ion 620 mAh battery |
| Type: | Li-Ion |
| Memory | |
| Expandable: | No |
| Body | |
| Dimensions: | 79 x 41 x 19.6 mm (3.11 x 1.61 x 0.77 in) |
| Weight: | 80 g (2.82 oz) |
| Connectivity | |
| Wifi: | No |
| Bluetooth: | No |
| Nfc: | No |
| Headphone Jack: | No |
| Network: | GSM |
| Colors: | Panther Black, Dolphin Grey |