Choosing the Client 
The Web interface technology Web Dynpro is client-independent - that is, different clients can be implemented for displaying Web Dynpro applications.
When the application is executed on the SAP NetWeaver Portal, you can use its functions. The SAP NetWeaver Portal offers a role-based and safe access to information and enables you to use the event handling, navigation functions, as well as personalization.
You can execute a Web Dynpro application in different browsers. For an overview of the browsers currently supported by SAP, use the following link in SAP Service Marketplace in the Product Availability Matrix: http://service.sap.com/pam
You can execute a Web Dynpro application on a mobile device. Supported devices are pocket PCs such as BlackBerry Wireless Handhelds.
More Information: Developing Mobile Always Connected Applications