do you have some sample code of a datagrid that can be used in both full screen mode and mobile ?

Actually, I use the grid on my mobile device. Set the grid width to 100% and don't use scrolling. You may need to customize your css for the pager though. I had to. Just create a custom pager for that and you should be good. Some browsers on older phones may have trouble with the ajax, being they will behave slowly, so keep your page size small so to minimize data load, and DOM building. All the backend code is pretty much the same.