Modern mobile phones use multi-purpose operating systems similar to those used in desktop computers providing a similar set of features for end users. The essential feature set needed by a mobile phone contains the cellular modem telephony support. This thesis describes and analyses the cellular telephony software architecture of the Mer system.

The software covered in this work is publicly available software. Therefore this work covers how that software can be utilized in other systems than the original system, the concepts of free and open source, as well as software licensing.

The work covers the concept of Android and its cellular telephony support parts that are relevant to this work. A section of this work is dedicated to how the parts of Android, that are relevant to cellular telephony, can be reused. The concept of Mer as a system is described and how it relates to Android.

The main focus of this thesis is in describing the Mer cellular telephony architecture and its parts. This thesis also presents some findings worth noting regarding the Mer cellular telephony architecture. The conclusion chapter contains the personal opinions formed of the system that was analysed and described.