BenQ-Siemens P51 vs BenQ P50
| Type | Bar (classic) | Bar (classic) |
| Dimensions | 122.00 x 60.00 x 20.00 mm | 122.00 x 60.00 x 20.00 mm |
| Weight | 170.00 g | 170.00 g |
| Display size | 2.83" | 2.80" |
| Display | Color / TFT 64k colors 240 x 320 px (2.83") 141 ppi | Color / TFT 64k colors 240 x 320 px (2.80") 143 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 300 min. (5.0 h) | 2G: 240 min. (4.0 h) |
| Stand-by (max.) | 2G: 185 h. (7.7 days) | 2G: 120 h. (5.0 days) |
| Standard battery | Li-Ion 1320 mAhBuy powerbank
| Li-Ion 1240 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 192 MB | 64 MB |
| End-user memory | 128 MB |  |
| RAM memory | 64 MB | |
| Memory cards |  SD, SDIO | SD, MMC |
| Operating system | MS Windows Mobile 5.0 | MS Windows Mobile 2003 Pocket PC |
| Processor | Intel XScale PXA272 | Intel XScale PXA272 |
| Processor clock | 416 MHz | 416 MHz |
| GPU | - | - |
| Touchscreen | | |
| SAR (10g) | | 1,2 W/kg |
| DualSIM | | |
| Announced | 1Q 2007 | |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | | |
| LTE standard | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | 1.3 Mpx | 1.3 Mpx |
| Resolution | 1280x960 px | 1280x960 px |
| Optical zoom | | |
| Digital zoom | 4x | 4x |
| Flash | LED | LED |
| Dual-colour LED flash | | |
| Video resolution | 320x240 px | 320x240 px |
| Video formats | WMV, MPEG4, 3GP, H.264 | MPEG4, WMV, 3GP, H.263 |
| Additional | - | - |
CAMERAS - FRONT
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSUPA | | |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | |
| LTE UP | | |
| WIMAX+ | | |
| GPRS | class 10 | class 10 (4+1/3+2) |
| EDGE | | |
| Bluetooth | | v1.1 |
| HDMI | | |
| WiFi | v802.11 b/g | v802.11 b |
| WiFi frequencies | 2,4 GHz | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | | |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AMR, MIDI, WAV, WMA | AMR, MIDI, WAV, WMA |
| Polyphony | 64 voices | 64 voices |
| Ring composer | | |
| Games | | |
| Java | MIDP 2.0 | MIDP 2.0 |
| Videophone | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |