Some users Galaxy S21, Galaxy S21 + and Galaxy S21 Ultra report that WhatsApp app gets disconnected frequently on their smartphones. After disabling WhatsApp, the following message is displayed on the desktop and in the currently open web applications:
Phone Note Connected (WhatsApp is not connected). Make sure your phone has an active internet connection. And this can be very annoying, especially if you want to continue the conversation without reopening the application on your phone.
The issue may be related to Samsung’s aggressive battery optimization
This issue may be related to the power optimization method that Samsung has applied to this series of batteries. It lies in the fact that unused applications are put into sleep mode when the phone screen is locked, and this prevents the application from receiving notifications in real time. In the WhatsApp FAQ section, tech support explains that the disconnect problem occurs when the internet connection is unstable, or when the smartphone closes an application that is running in the background.
Despite disabling the battery optimization feature, allowing background network activity (even in battery saving mode) and reinstalling WhatsApp on their Galaxy S21 series smartphone, some users still face the problem of disabling the messenger. Some users have even tried a factory reset to check if the problem persists, but to no avail.
Some of the owners of Galaxy S21, Galaxy S21 Ultra and even Galaxy Z Fold 2 smartphones face this problem, some do not. Some users claim that this the problem got worse on Galaxy phones with updates to Android 11 and One UI 3.1… For the sake of fairness, we note that this problem was also found on smartphones from other manufacturers.
Samsung recently topped the list of Android smartphone OEMs that aggressively disable background apps on their devices. Google does not recommend using this battery saver, but most Android OEMs still do it to maximize battery life. If you encounter this issue on your Samsung smartphone, please share it in the comments below. Perhaps your experience in solving it will be useful to other users.