| Local Name | Asha 503 |
| Technology | GSM / HSPA |
| 3G Bands | HSDPA 900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | HSPA 7.2/5.76 Mbps |
| GPRS | Up to 85.6 kbps |
| EDGE | Up to 236.8 kbps |
| Announced | 2013, October |
| Status | Available. Released 2013, November |
| Dimensions | 102.6 x 60.6 x 12.7 mm (4.04 x 2.39 x 0.5 in) |
| Weight | 110.2 g (3.88 oz) |
| SIM | Micro-SIM |
| Display Type | TFT capacitive touchscreen, 256K colors |
| Screen Size | 3.0 inches, 27.9 cm2 (~44.8% screen-to-body ratio) |
| Resolution | 240 x 320 pixels, 4:3 ratio (~133 ppi density) |
| Protection | Corning Gorilla Glass |
| OS | Nokia Asha software platform 1.2 |
| Card Slot | microSD, up to 32 GB (dedicated slot), 4 GB card included |
| Camera Features | LED flash |
| Video | 480p@19fps |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11 b/g/n |
| Bluetooth | 3.0, A2DP |
| GPS | No |
| Radio | Stereo FM radio |
| USB | microUSB 2.0 |
| Sensors | Accelerometer, proximity |
| Features Summary | SNS apps, MP4/H.263 player, MP3/AAC player, Photo editor, Organizer, Voice memo, Predictive text input |
| Battery | Removable Li-Ion 1200 mAh battery (BL-4U) |
| Stand By | Up to 840 h (2G) / Up to 840 h (3G) |
| Talk Time | Up to 12 h (2G) / Up to 4 h 30 min (3G) |
| Music Play | Up to 34 h |
| Colors | Yellow, black, green, red, blue, white |
| SAR EU | 1.43 W/kg (head) 0.64 W/kg (body) |
