Ultimately, choosing the best flagship phone for you comes down to your specific needs and preferences. If you prioritize camera features, a feature-rich interface, and don't mind its higher price point, the Samsung Galaxy S23 Ultra is a fantastic option that's likely to only be beaten by its successor, the Galaxy S24 Ultra. However, if you're willing to wait for its international launch, the OnePlus 12 can provide you with a clean software experience, competitive pricing, and solid performance that goes way beyond its price point. While Samsung is an established high-end smartphone brand, OnePlus is quickly proving that alternative competitors can break into the mainstream.