| General | |
| Manufacturer: | Samsung |
| Model: | GT-I5510 Galaxy 551 |
| Other names: | Callisto |
| Year: | 2010 |
| Operating system: | Android 2.2, Android 2.3 |
| Capacity battery (MAh): | 1200 |
| Measurements | |
| Dimensions (mm): (width x height x thickness) |
55 x 111 x 15.3 |
| Weight (g): | 116 |
| Processor | |
| Processor Type: | Qualcomm Snapdragon S1 MSM7227 |
| Clock Frequency (MHz): | 667 |
| Memory | |
| Random access memory (RAM) (MB): | 512 |
| Read-only memory (ROM) (MB): | 512 |
| Communications | |
| Phone: | GSM 1800, GSM 850, GSM 900, UMTS 2100, UMTS 900 |
| Bluetooth: | 3.0 |
| Wi-Fi: | 802.11b,g,n |
| Other: | EDGE, GPRS, GPS, HSDPA, HSUPA, UMTS/WCDMA |
| Multimedia | |
| Screen Size: | 3.2 |
| Screen Resolution (px): | 240 x 400 |
| Screen type: | TFT |
| Accelerator: | Adreno 200 |
| Rear camera (Mp): | 3 |
| Autofocus: | Yes |
| Speaker: | stereo |
| Output of earphones: | 3.5 |
| Other: | FM-radio, G-Sensor, Light sensor, Proximity sensor, Digital compass |
| Management and input | |
| Touchscreen: | capacitive |
| Buttons: | QWERTY-keyboard, navigation buttons, physical buttons |
| Extension | |
| Memory Cards: | microSD, microSDHC |
| Connectors: | microUSB |
| Additionally | |
| Features: | DLNA |