| 2G Network | GSM 900 / 1800 / 1900 - Z525i |
| | GSM 850 / 1800 / 1900 - Z525a |
| Announced | 2006, April |
| Status | Discontinued |
| Dimensions | 83 x 46 x 24 mm |
| Weight | 94 g |
| Type | TFT, 65K colors |
| Size | 128 x 160 pixels, 1.8 inches, 29 x 35 mm (~114 ppi pixel density) |
| | - Second external CSTN display 4096 colors (101 x 80 pixels)
- Wallpapers, screensavers |
| Alert types | Vibration; Downloadable polyphonic, MP3, AAC ringtones, composer |
| Loudspeaker | Yes |
| 3.5mm jack | No |
| Card slot | No |
| Phonebook | 500 x 8 fields, Photo call |
| Call records | 30 received, dialed and missed calls |
| Internal | 12 MB |
| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps |
| EDGE | No |
| Speed | No |
| WLAN | No |
| Bluetooth | Yes, v2.0 |
| Infrared port | Yes |
| USB | Yes |
| Primary | VGA, 640x480 pixels |
| Video | Yes |
| Secondary | No |
| Messaging | SMS, EMS, MMS, Email, Instant Messaging |
| Browser | WAP 2.0/xHTML |
| Radio | No |
| Games | Yes + downloadable |
| GPS | No |
| Java | Yes, MIDP 2.0 |
| Colors | New Blue |
| | - Push-to-talk
- MP3/AAC/MP4 player
- Image editor
- Exchangeable covers
- Organizer
- SyncML |
| | Standard battery, Li-Ion |
| Stand-by | Up to 320 h |
| Talk time | Up to 5 h |
| SAR US | 1.47 W/kg (head) 0.70 W/kg (body) |
| Price group | |
