I have few SSRS reports (with charts, gauges etc) deployed to the server and they all work fine but not so well when viewed as well worked upon on cell phones/tablets. 
The users find difficult to choose the report parameters, selecting from drop downs and also presentation of data through charts, gauges etc.

I am thinking to modify the SSRS report for cell phones but not sure how to progress. I have searched and started reading some blogs but thought of asking suggestions of experts here who may already dealt this.

I have sample RDL files (deployed to the report server) that I can post here but they are any other typical SSRS Reports with various parameters, charts, gauges etc. 

Many thanks.

Please share your thoughts.