The BenQ-Siemens S81 is a mid-range mobile phone released in the mid-2000s. Below are its key specifications and a summary of customer reviews:

Specifications:

• Display: 2.0-inch TFT, 176 x 220 pixels
• Camera: 1.3 MP (no flash)
• Memory: 16 MB internal (expandable via microSD)
• Connectivity: Bluetooth, USB, GPRS
• Battery: 820 mAh (up to 300h standby, ~4h talk time)
• OS: Proprietary feature phone OS
• Dimensions: 100 x 46 x 17 mm
• Weight: 90g
• Other Features: MP3 player, FM radio, video playback

Summary of Customer Reviews:

• Pros:

  • Sleek, lightweight design with a solid build.
  • Good audio quality for calls and music playback.
  • Decent battery life for basic usage.
  • Simple, user-friendly interface.

• Cons:

  • Low-resolution camera with no flash.
  • Limited internal storage without expansion.
  • Outdated even at launch compared to competitors.
  • Occasional software lag reported.

Overall, it was seen as a basic, functional phone but lacked advanced features even for its time.