Use of etelmm.h legal?

I want to use etelmm.h in my application. Since I am an independant developer, I do not have access to the 'premium' SDK content. Everything I am using I have found through either Nokia, Symbian, or Motorola websites (publicly available).

My question is: Am I going to get screwed by Nokia or Symbian if I develop software using this header file? Obviously the library that etelmm.h refers to is on my Series 60 phone (6620, in this case). I am merely calling items within that library (specifically RMobileCall.OpenExistingCall).

Has anyone else run into this issue? Is there something buried deep down in the user agreements for the SDK's that says that I cannot call a specific routine within a public library? Will my application pass Symbian Signed certification if I use one of the 'forbidden' header files?

I would really like to hear from Nokia or Symbian on this one, or at least find out who to talk to about it.