the version of CKEditor used in Power CMS Builder is CKEditor 3.5.2, i believe the newer CKEditor version 3.6.2 is compatible with mobile devices, but I'm not sure about the galaxy tablet.
the CKEditor installation instruction can be found here:
Installation
the section titled Upgrade has details on upgrading the CKEditor, these instruction are valid for upgrading the version in Power CMS Builder.