Some apps on my Samsung Galaxy Note 8 (Android OS) do not work intermittently or work very slowly when my mobile phone is connected to the WLAN. The signal strength is not the problem, because my notebook is running perfectly, as are other apps that are not affected by the problem.
The apps are relatively random… From DAZN ("Oops, something went wrong!"), Amazon Music (play button does not respond) to Tagesschau (loads, loads, loads, loads, loads, …) to our local waste -App from the district. At the same time, WhatsApp runs perfectly, as does Amazon Shopping, YouTube, etc.
When I turn off Wi-Fi and surf using mobile data, all apps run fine.
What could be the problem here? Our internet provider is Vodafone Kabel Deutschland, 200 Mbit / s. According to the speed test, I occasionally have an exclamation point when pinging, but currently it is 30 ms.
Perhaps the Bluetooth (also runs at 2.4 GHz like WLAN) interferes with the audio in apps. Send bluetooth. Just switch off Bluetooth and test it. If it is better then use 5 GHz WLAN instead of 2.4 GHz WLAN.
Router already restarted?
I can exclude bluetooth because my wife has it permanently off. In addition - as I said - other apps work perfectly and the connection is definitely there, only some apps can't operate their functions from the signal.
Restarting the router does not solve the problem. It then usually somehow dissolves the next day and comes back on other days. Sometimes it takes a few hours, sometimes a few days, always different.
I thought loosely of any fluctuations in the Wi-Fi that cause errors in sensitive apps?
I suspect that the DNS server, which is automatically assigned to the smartphone via IP configuration when a new Wi-Fi connection is established, is not working properly or is totally slow.
Because some apps access a fixed IP address (without a query via the DNS server) which then have no problem, other apps typically use the DNS server to determine the IP address of the server (on the Internet).
Simply delete the Wi-Fi connection on your smartphone and then reconnect to your Wi-Fi. Because this is how the smartphone is freshly assigned the IP configuration.
Such a procedure is explained here:
