Solution:
1. Do not use wet hands or operate the screen when there is water stains on the screen. Check whether it is normal after drying.
2. Please judge whether a single function cannot vibrate or all functions cannot vibrate.
3. If the single function cannot vibrate, please check whether the function setting is normal (for example, if some apps do not remind the problem, the single function cannot vibrate, it is generally a problem of setting or using, not a problem of product quality).
4. If all the functions cannot be vibrated, please apply for after-sales inspection.