The conversation between human and AI assistant.
What is your review of iPhone 4?
Do you think it's worth purchasing in 2021?
It really depends on your needs and preferences. If you are someone who only needs a phone for basic tasks and doesn't want to spend a lot of money, then the iPhone 4 could be a good option. But if you need a phone that has the latest technology and can handle more advanced tasks, you may want to consider a newer model.