Ascom Network Testing (formerly Mobile Test Solution) business unit has been world leader in Mobile Network Quality testing since 1993. Their Symphony Product Range is unique in offering both walk/drive test and stationary testing systems. Users can measure Quality of Service as experienced by the subscribers, as well as optimising the network and the mobile applications - from video streaming, e-mail on the move, mobile TV to ring tone download and mobile internet transactions. Detecting and solving radio network issues, handset / network service incompatibilities, regression testing, service monitoring and billing means that the complete user experience can be measured and assured.