What should I do if Xiaomi 9 mobile phone card reacts slowly?

When the mobile phone card is dead and the response is slow, it is recommended to adopt the following methods to troubleshoot:

1. If the problem occurs in a high-temperature environment, it is recommended to test in a low-temperature environment, and heating may cause the machine to jam;

2. Try to uninstall the optimization, power saving and security software in the mobile phone, and close the self-startup items that are not commonly used;

3. In Settings >> More Settings >> In the developer options, turn off all window animation scaling, transition window animation scaling and animation program duration adjustment (if the animation effect in the developer options is modified, the visual fluency effect will be reduced);

4. It is recommended that the mobile phone be effectively backed up and returned to the factory, and the backup attempt should not be resumed;

5. Still unable to solve after returning to the factory; It is recommended to try flash_all script line brush (the new version of Xiaomi Assistant line brush can be used for BL lock models, and it is not recommended to conduct after-sales inspection).

If all the above methods are ineffective, it is recommended to take the mobile phone to Xiaomi Authorized Service Center for testing and processing.