Restart cell phone Wi-Fi?

I'm connected to the Wi-Fi with my cell phone (Galaxy S7), but after 10-20 minutes no video or a page loads and it is the same for games. Only when I turn off the Wi-Fi on my cell phone and switch it back on again and then only again for 20 minutes. This never happens on the laptop, only on cell phones. It also happens to my brother.

What could it be?

Could be that your smartphone switches between 2.4 GHz and 5 GHz WLAN, and thereby falls on the "nose". Or even the router "wrongly" sends your smartphone into the low-range 5 GHz (band steering!). Nothing works perfectly!

Solution idea:

If you have a dual-band router (Wi-Fi with 2.4 GHz and 5 GHz with the same SSID), then some Android devices have problems with it.

Log in to the router (go to the configuration page of the router in the browser) and try switching off the Wi-Fi at 5 GHz completely, or give the Wi-Fi a different Wi-Fi name (SSID) only for 5 GHz.

Delete "your Wi-Fi connection" on the Android device and connect freshly to your Wi-Fi (in the close range with 5 GHz, more distant with 2.4 GHz) best with the WPS button on the router and the menu "press WPS button" on the smartphone (this menu can be found in the list of WLANs).

If it works stable then your problem is solved!