Can my iPhone 4s be replaced with the iPhone 14, 15 Plus or Pro?

A 4S is pretty much worthless at this point. It’s no longer supported and not usable as a phone in most of the world anymore.

Apple won't give any money for that model. If you sell it to someone else, ask them.

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Hello ~ You may replace your iPhone with any model you chose. Selling your iPhone 4s may be your best option for someone wanting that particular model for a specific reason. Apple will recycle it for you.

~Katana-San~