Since SAP Basis 7.31 SP05 there have been a change in SICF settings regarding logon protection. To be able to logon with a mobile application please check  ”Deactivate Login XSRF Protection”.

  • Start transaction SICF
  • Double click on the /neptune/native
  • Press change button
  • Select Error Pages tab
  • Select Configuration
  • Change the settings

This setting only apply to Online applications with jQuery Mobile. For SAPUI5 applications this is not an issue and we recommend you to keep the standard settings if you only run SAPUI5 applications.