| Manufacture | Nokia | Sony Ericsson |
| Model | Asha 303 | Z525 |
| Form factor | Block | Clamshell/fold |
| Weight | 99 gram | 94.00 |
| Dimensions (HxWxD) | 117 x 56 x 14 | 83.00 x 46.00 x 24.00 |
| Operating System | Series 40 | Other |
| Networks | 2G - 850/900/1800/1900
3G - 850/900/1700/1900/2100 | 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 | NA | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 3.2 megapixel, full focus, 4x digital zoom | 0.3 Megapixels (640x480), 4x digital zoom |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | NA | NA |
| Video recording | | |
| Video capture resolution | NA | NA |
| Second Camera | NA | NA |
| Display size | 2.6 inches | 1.80 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 262144 | 65536 |
| Display width | 240 | 128 |
| Display height | 320 | 160 |
| PPI | 153.85 | 113.83 |
| Second Display | NA | NA |
| CPU | NA | NA |
| GPU | NA | NA |
| Memory | 100 MB. Expandable up to 32 GB with microSD card | 12 MB |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | MP3, MP4, AAC, AAC LC, AAC+, eAAC+, WMA, WAV, NB AMR, MXMF, NRT | NA |
| Java | | |
| Games | Yes | Java |
| FM Radio | | |
| Battery | 1300 mAh | NA |
| Standby time (h) | 857 | 322 |
| Talktime (m) | 490 | 300 |
| Wireless Charging | | |
| Browser | 2.0 XHTML, HTML. Nokia Web Browser | 2.0 XHTML |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | |
| RSS reader | | |
| Voicememo | | |
| PC Synchronization | | |
| SyncML | | NA |
| Website | Website | Website |
