Sending commands from a mobile phone

I want to send simple commands (turn left, right, start, stop, speed 123,
etc) from a mobile phone with Symbian OS to a mobile robot.
I have strong C++ experience both in Linux and MSWindows but I do not have
experience in SW development in Symbian OS.
Can someone suggest how can I start writing apps for mobile phone?
Which SW development tools?
Demo/example codes for Symbian apps?
Is there any mobile phone to/from robot comm apps examples on the web?