Google has not released an update to fix the lag issues on Nexus 7 (2012) after Android 5.0 Lollipop update and complaints from users are growing by the day. Currently, the solution is either clearing the cache and we explain restoring the tablet to Android KitKat. Before
Is your WhatsApp not working? Try these methods to fix it
If you’re having trouble connecting to your WhatsApp, first try following these suggested steps which are usually the simplest and effective solution. Firstly, switch your device off and then power up again after a few minutes. After you have done this, do the same with your Wi-Fi and airplane mode