You already know that Speaking part 2 & 3 phases are related with each other. I have discussed in detail about the speaking test as a whole, speaking assessment criteria, speaking part 2 that is individual long turn and part 3 which is a two way discussion.
So the attached prompt is for both phases 2 & 3 taken from Cambridge English IELTS Book 9. Look at the topic card and make a mind map, you have one minute to brainstorm your ideas, you can make notes if you want and use them during your talk. In the last phase the examiner will ask you questions related to the topic in part 2.
It is good if you record yourself.
Speaking Part 2 & 3 Prompt