| Manufacture | Sony | Sony Ericsson |
| Model | Xperia SX | K550 |
| Form factor | Block | Block |
| Weight | 95 gram | 85.00 |
| Dimensions (HxWxD) | 115 x 54 x 9 | 102.00 x 46.00 x 14.00 |
| Operating System | Android | Other |
| Networks | 2G - 850/900/1800/1900
3G - 800/900/2100 | 2G - 850/900/1800/1900
|
| HSCSD |  | |
| GPRS |  | |
| EDGE | | |
| UMTS | | |
| HSDPA | | |
| HSPA+ | | |
| WiMAX | | |
| LTE (4G light) | | |
| WLAN / Wi-Fi | | |
| Wi-Fi Hotspot | | |
| Wi-Fi Direct | | |
| SMS | | |
| MMS | | |
| Email | | |
| HDMI out | | |
| USB port | | |
| MHL | | |
| Bluetooth | | |
| Bluetooth version | 3.0 | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 8.1 megapixel, autofocus, 16x digital zoom | 2 Megapixels with auto-focus. 2.25x digital zoom |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | Pulsed LED | NA |
| Video recording | | |
| Video capture resolution | 1080p | NA |
| Second Camera | NA | NA |
| Display size | 3.7 inches | 1.90 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 16777216 | 262144 |
| Display width | 540 | 176 |
| Display height | 960 | 220 |
| PPI | 297.69 | 148.28 |
| Second Display | VGA 640x480 | NA |
| CPU | 1.5 GHz dual core Qualcomm Snapdragon MSM8960 | NA |
| GPU | Adreno 220 | NA |
| Memory | 1 GB RAM. 4 GB internal storage. Expandable with micoSD card | 64MB. Expandable with Memory Stick Micro card |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | MP3, AAC, AAC+, eAAC+, FLAC, OGG Vorbis, AMR-NB, AMR-WB | Polyphonic, MP3, AAC |
| Java | | |
| Games | Yes, downloadable | Java |
| FM Radio | | |
| Battery | 1500 mAh | 950 mAh |
| Standby time (h) | 280 | 350 |
| Talktime (m) | 360 | 420 |
| Wireless Charging | | |
| Browser | Android HTML Webkit | 2.0 XHTML |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | |
| RSS reader | | |
| Voicememo | | |
| PC Synchronization | | |
| SyncML | | |
| Website | Website | Website |
