For an English exam, use "... any words" and "... anybody phones." For ordinary speech, native speakers will use either the negative or positive form (any/some, anybody/somebody) depending on their view of the probability of none/nobody.
Is there any bread left? [possibly, there isn't any bread to eat]
Is there some bread left? [probably, there is some bread to eat]
English Grammar in Use by Murphy is an excellent book. A paper copy is affordable and a google search will find a PDF copy.
4th edition - Unit 84 - Some and any - p. 170
We use both some and any in questions. We use some/somebody/something to talk about a person or thing that we know exists, or we think exists.
- Are you waiting for somebody? (I think you are waiting for somebody)
We use some in questions when we offer or ask for things.
- Would you like something to eat? (there is something to eat)
- Can I have some sugar, please? (there is probably some sugar I can have)
We often use any after if:
- If anyone has any questions, I'll be pleased to answer them.