x PhoneArena is looking for new authors! To view all available positions, click here.

Benq-Siemens EF51

Feb 13, 2006
Market status


No pros


  • Lacks microSD slot for storage expansion
  • It is so thick it needs a personal fitness trainer (0.70 inches inches)
  • Lacks an ambient light sensor for automatic screen brightness adjustment




Benq Siemens EF51 is a tri-band GSM phone with color display and megapixel camera. It has flip with music dedicated keys and numeric keypad under it. It features music playback and the 20MB of internal memory are expanded through miniSD cards

Do you ...?



  • Dimensions:
    • 3.50 x 1.92 x 0.70 inches (89 x 49 x 18 mm)
  • Weight:
    • 3.35 oz (95 g)
      the average is 5.3 oz (150 g)


  • Resolution:
    • 128 x 128 pixels
  • Technology:

    Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.

    • TFT
  • Colors:
    • 262 144


  • Camera:
      • 1.3 megapixels
    • Features:
      • Digital zoom, Self-timer
    • Shooting Modes:
      • Effects


  • Built-in storage:
    • 0.02 GB
  • Storage expansion:
    • miniSD


  • Talk time:
    • 4.00 hours
      the average is 15 h (887 min)
  • Stand-by time:
    • 8.3 days (200 hours)
      the average is 18 days (424 h)
  • Capacity:
    • 870 mAh


  • Radio:
      • FM


  • GSM:
    • 850, 1800, 1900 MHz
    • Other version supports GSM 900/1800/1900 MHz
  • Data:
    • GPRS


  • USB:
      • Yes
  • Other:
    • Computer sync
specifications continue after the ad

Other features

  • Notifications:
    • Music ringtones (MP3), Polyphonic ringtones (64 voices), Vibration, Phone profiles, Speakerphone
    • Voice dialing, Voice commands, Voice recording


  • Officially announced:
    • 13 Feb 2006

To see the full specifications with in-depth details click here.

Despite our efforts to provide full and correct Benq-Siemens EF51 specifications, there is always a possibility of making a mistake. If you see any wrong or incomplete data, please LET US KNOW.

If you are interested in using our specs commercially, check out our Phone specs database licensing page.


iPad 2 Cases

Latest stories