A mobile device receives, from a user, parameters for a user interface theme associated with an application. A SAW sensor outputs a reception signal after a delay from receipt of the transmission signal. The time of day and the day of the week may be considered when determining whether a user is a high-bandwidth user. This device can be used in a number of different consumer apparatus, such as a mobile phone. Coverage enhancing catalyst is removed after coating and curing. Combinations of inducers including a hybrid polar compound andor a xanthine derivative andor an alkanoic acid can also be used, optionally at temperatures less than 37 C.