We introduce a form of networked music performance where a performer plays amobile music instrument while it is being implemented on the fly by a livecoder. This setup poses a set of challenges in performing a music instrumentwhich changes over time and we suggest design guidelines such as making asmooth transition, varying adoption of change, and sharing information betweenthe pair of two performers. A proof-of-concept instrument is implemented on amobile device using UrMus, applying the suggested guidelines. We wish that thismodel would expand the scope of live coding to the distributed interactivesystem, drawing existing performance ideas of NIMEs.