PS - Search is your friend. this has been covered countless times in this forum...
op did say they tried to search for it. I know this muddies the tour threads. We need sub threads and a better search engine. I myself have had difficulty finding things. I find the more vague the search the better the results. search one word instead of a phrase.
I don't believe the OP performed a real search and here's why:
A simple search for "missed calls + messages" returned the following threads, all of which were in the first 15 search results and all of which answer the question accurately:
