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Mobile Devices

Siemens A55 Mobile Phone Teardown

14 July 2004
The following is an overview of a teardown analysis conducted by IHS Technology Teardown Services.

This is a very basic entry-level phone with limited feature set and monochrome 1.6 inch diagonal display.

The Siemens A55 phone is similar in many aspects to other models previously analyzed (A56, S55, and C60) and shares a lot of commonality of parts and construction with these models. The core baseband processor Infineon PMB7850 was used in all of these phones, as were Dialog ASICs assumed to be for power management.

Siemens A55 has more integration in the RF section:

  • FEM with integrated RF SAW filters
  • ZIF Transceiver with integrated VCO



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