In case of failure to receive notifications, you may follow the steps below to troubleshoot:

1. In case of failure to receive messages every time you turn on the tablet after turning it off, you need to open the app that needs to receive messages before you can receive them.

2. Do not manually delete the background apps in the commonly-used menu interface, as this may lead to failure to receive messages.

3. Please turn on the app that needs to receive notifications, long press the app, go to App Information > Battery, open the Battery Limit, and select “Unlimited”.

4. Go to System manager > Open system manager > Application Management - Self-startup management > Auto memory cleaning, set auto memory cleaning as default for the target app. For the new 4.0 OS, guidance will be provided directly, and you will be guided to add a whitelist when installing a downloaded app.

5. If your phone memory is relatively small, you need to regularly clean up the background data so that the system does not automatically clean up the apps due to the memory being low, resulting in failure to receive information