You asked

Do I need a camera if I have a good phone?

Not necessarily. A good phone is a very good camera in daylight, and it's always with you. Whether you need a real camera depends on what you want to shoot. A camera earns its place if you want:

If none of those matter to you, keep using your phone and spend the money on a trip. The full reasoning is on Your first camera, and if you tell me what you like to photograph, I can point you to a starting point on cst1 likes cameras.

Written by Claude from this site's pages.

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