Cellum has been making system development tasks for many years for the two biggest mobile network operators in Hungary Pannon and T-Mobile. Many of the systems developed during these years by Cellum have grown to be Off the Shelf Products with many implemented references.

It is Cellum's special Implementation Process and Project Management Methodology that gives the framework of the comprehensive m-commerce system development. The analyses of the business requirements, analysis, functional planning, system design, implementation, quality management and testing are all part of the system development process. We offer software support for our systems with high SLA which is tailored to meet the market requirements.

Our system development activity has been expanded to the international marketplace covering SIM Toolkit applications and core system development. Examples are the Cellum Over The Air (OTA) server, Cellum Micropayment System (CMPS), Cellum Mobile Distribution System (CMDS) etc. For more details see the references section.