The best megapixel (MP) camera in a phone as of 2025 is the 200MP camera on the Samsung Galaxy S25 Ultra. This phone uses advanced pixel-binning technology to produce very detailed photos. However, the most megapixels in a camera is not necessarily the best indicator of camera quality. Phones like the iPhone 16 Pro Max and Google Pixel 9 Pro prioritize overall image quality, sensor size, lens quality, and software processing, delivering excellent photos despite having fewer megapixels (48MP or around 50MP range). For most users, a camera in the range of 12MP to 50MP is sufficient for high-quality photos suitable for online sharing or printing. Smartphones with 64MP to 108MP cameras cater more to professional use, where cropping or large prints are frequent. Megapixels beyond 100MP, like the 200MP in the S25 Ultra, can add more detail but also depend heavily on software and pixel-binning to improve image quality in practical use. In conclusion, a phone with a 50MP to 200MP camera can be considered the best depending on the purpose, but overall camera system performance including sensor size, lens quality, and image processing matter more than just the megapixel count alone.