I believe suna is asking if there is a number they can dial (such as 0800 xxxx xxx or 0845 xxxx xxx) which will use up the inclusive minutes they have on their mobile price-plan, and yet the call will forward itself to a national fixed line number instead, which the price-plan normally charges for.
Or it may be the other way around I guess.
In any case, I don't know; I think one would need a specific example or two, but the answer is probably, "no".