See http://qt.nokia.com/doc/qtcreator-1.3/creator-qt-for-symbian.html (and similar versions of the doc supporting Qt for Symbian)

The doc states:
===================
Running Qt based applications on real devices requires the following packages to be installed on your device. The packages can be found in the S60 SDK where you installed Open C/C++:

nokia_plugin\openc\s60opencsis\pips_s60_<version>.sis
nokia_plugin\openc\s60opencsis\openc_ssl_s60_<version>.sis
nokia_plugin\opencpp\s60opencppsis\stdcpp_s60_<version>.sis
=========================

The problem with the above is that the listed dependencies are for Qt itself, not for Qt applications. Qt applications would also need the Qt libraries installed so the text should be:
===================
Running Qt based applications on real devices requires the following packages to be installed on your device.

a) The Qt libraries. The package can be found in the installation directory of Qt for Symbian

• qt.sis
  b) The Open C libraries. The packages can be found in the S60 SDK where you installed Open C/C++:
• nokia_plugin\openc\s60opencsis\pips_s60_<version>.sis
• nokia_plugin\openc\s60opencsis\openc_ssl_s60_<version>.sis
• nokia_plugin\opencpp\s60opencppsis\stdcpp_s60_<version>.sis
  =========================