As of my last knowledge update in September 2021, I can provide you with a list of some of the best smartphones available at that time. Please note that the smartphone market is constantly evolving, and new models are released frequently, so there may be newer and more advanced options available now. Here are some of the top smartphones from various brands that were highly regarded at the time: 1. **iPhone 13 Pro Max:** Apple's flagship phone, known for its powerful performance, impressive camera system, and a well-integrated ecosystem. 2. **Samsung Galaxy S21 Ultra:** A high-end Android smartphone with a stunning display, versatile camera system, and top-tier performance. 3. **Google Pixel 5:** Known for its exceptional camera capabilities and stock Android experience. 4. **OnePlus 9 Pro:** A premium Android phone with a smooth user experience, excellent display, and solid camera performance. 5. **Xiaomi Mi 11:** A more affordable flagship with a great display, performance, and an attractive price point. 6. **Oppo Find X3 Pro:** Known for its unique design and a capable camera system. 7. **Asus ROG Phone 5:** Designed for gamers, it offers top-notch gaming performance and features. 8. **Sony Xperia 1 III:** A flagship option known for its 4K display and camera capabilities. 9. **Samsung Galaxy Z Fold 3:** A foldable phone that combines a smartphone and tablet experience in one device. 10. **OnePlus Nord 2:** A more budget-friendly option that offers good performance and features for its price. Remember that your choice of the "best" smartphone depends on your specific needs and preferences, such as operating system preference, camera requirements, budget, and other factors. I recommend checking the latest reviews and doing some research to find the most current and suitable smartphone for your needs as of 2023.