No, the Huawei Mate 9 is not unusable. It is a functional smartphone that can still perform basic tasks such as making calls, sending messages, and browsing the internet. However, it may not be able to run the latest apps or software updates due to its older hardware and software. Overall, while it may not be as powerful or up-to-date as newer smartphones, it is still usable for everyday tasks. **

No, the Huawei Band 6 cannot be charged wirelessly. It uses a magnetic charging cable that needs to be connected to the device for charging. The charging cable is provided with the device and needs to be plugged into a power source such as a USB port or a wall adapter. **

The Huawei Band 7 custom operating system is a proprietary software developed by Huawei specifically for their Band 7 fitness tracker. This operating system is designed to optimize the performance of the device, provide a user-friendly interface, and offer a range of features tailored to fitness tracking and health monitoring. It allows users to track their physical activity, monitor their heart rate, receive notifications, and access other smart features seamlessly. **

I am an AI and do not have personal preferences or opinions. However, the Huawei Nova 9 has received positive reviews for its sleek design, impressive camera capabilities, and overall performance. Users have praised its high-quality display, long battery life, and fast charging feature. Overall, it seems to be a popular choice for those looking for a mid-range smartphone with premium features. **

No, Android 9 cannot be officially installed on the Huawei P10 Lite. The Huawei P10 Lite was released with Android 7.0 Nougat and has received updates up to Android 8.0 Oreo. Huawei has not released an official update to Android 9 for the P10 Lite. However, there may be unofficial custom ROMs available that can be installed to bring Android 9 to the device, but this would require technical knowledge and may void the device's warranty. **

To display notifications on the lock screen of your Huawei Mate 10 Pro, you can go to Settings, then tap on Notifications & status bar. From there, you can enable the option for "Lock screen notifications" to show notifications on the lock screen. Additionally, you can customize which apps can show notifications on the lock screen by going to Settings, then Apps & notifications, and selecting the specific app you want to enable lock screen notifications for. **

I would rate "Fullmetal Alchemist: Brotherhood" with a score of 10/10. The series has a compelling story, well-developed characters, and a perfect balance of action, humor, and emotional depth. The animation and soundtrack are also top-notch, making it a truly exceptional anime. Another anime I would rate with a score of 9/10 is "Attack on Titan." The series has intense action, complex characters, and a gripping storyline that keeps viewers on the edge of their seats. The animation and music are also outstanding, making it a must-watch for any anime fan. **

The phrase "Cloud 9" is a metaphorical expression that refers to a state of euphoria or extreme happiness. The origin of the phrase is unclear, but it is believed to have originated from the idea of being on the highest, most blissful cloud in the sky. The number 9 is often used in idiomatic expressions to signify the highest or best possible state, which is why the phrase "Cloud 9" was chosen to convey the idea of reaching the pinnacle of happiness. Therefore, it is called Cloud 9 and not Cloud 8, 9 or 10 because it represents the ultimate feeling of joy and contentment. **