| Manufacture | LG | Siemens |
| Model | Optimus Pro C660 | SX1 |
| Form factor | Block | Block |
| Weight | 129 gram | 116.00 |
| Dimensions (HxWxD) | 120 x 60 x 13 | 109.00 x 56.00 x 19.00 |
| Operating System | Android | Other |
| Networks | 2G - 850/900/1800/1900
3G - 900/2100 | 2G - 900/1800/1900
|
| HSCSD |  | NA |
| 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 | NA | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 3 megapixel | 0.3 megapixel |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | NA | NA |
| Video recording | | |
| Video capture resolution | NA | NA |
| Second Camera | NA | NA |
| Display size | 2.8 inches | 2.20 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 256000 | 65000 |
| Display width | 240 | 176 |
| Display height | 320 | 220 |
| PPI | 142.86 | 128.06 |
| Second Display | NA | NA |
| CPU | 800 MHz ARM11 MSM7227T | NA |
| GPU | NA | NA |
| Memory | 512 MB. 150 MB available to user. Expandable with microSD card. 2 GB card included | 24MB |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | MP3, AMR, AAC, AAC+ | Polyphonic 40-tones |
| Java | | |
| Games | Yes | NA |
| FM Radio | | |
| Battery | 1500 mAh | Li-Polymer 1000 mAh |
| Standby time (h) | NA | 200 |
| Talktime (m) | NA | 240 |
| Wireless Charging | | |
| Browser | Android HTML Webkit | 2.0 |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | |
| RSS reader | | |
| Voicememo | | |
| PC Synchronization | | NA |
| SyncML | NA | NA |
| Website | Website | Website |
