| Manufacture | Nokia |
| Model | 603 |
| Form factor | Block |
| Weight | 110 gram |
| Dimensions (HxWxD) | 114 x 57 x 13 |
| Operating System | Symbian Belle |
| Networks | 2G - 850/900/1800/1900
3G - 850/900/1700/1900/2100 |
| 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 | NA |
| DLNA | |
| GPS | |
| Glonass | |
| ANT+ | |
| IrDA | |
| NFC | |
| 3.5 mm audio connector | |
| Camera | |
| Camera resolution | 5 megapixel, face recognition, face tracking, geo tagging, f/2.8, 4.3mm focal length |
| Image Stabilization | |
| BSI sensor | |
| Camera Flash/Light | |
| Flash type | NA |
| Video recording | |
| Video capture resolution | NA |
| Second Camera | NA |
| Display size | 3.5 inches |
| Touchscreen | |
| Colour display | |
| Number of colours | 16700000 |
| Display width | 360 |
| Display height | 640 |
| PPI | 209.8 |
| Second Display | NA |
| CPU | 1 GHz ARM 11 |
| GPU | NA |
| Memory | 512 MB RAM. 2 GB internal storage. Expandable up to 32 GB with microSD card |
| Micro SIM | |
| Dual SIM | |
| MP3 | |
| Ringtones / Music file format | MP3, AAC+, eAAC+, AMR-NB, AMR-WB, M4A, MP4 |
| Java | |
| Games | Yes |
| FM Radio | |
| Battery | 1500 mAh |
| Standby time (h) | 460 |
| Talktime (m) | 960 |
| Wireless Charging | |
| Browser | 2.0 XHTML, HTML |
| Calendar | |
| Voicedialing | |
| IP Code | NA |
| Predictive text | |
| RSS reader | |
| Voicememo | |
| PC Synchronization | |
| SyncML | |
| Website | Website |
