This exists on Android. If you enable the "developer settings" https://www.howtogeek.com/129728/how-to-access-the-developer-options-menu-and-enable-usb-debugg

This exists on Android. If you enable the "developer settings" https://www.howtogeek.com/129728/how-to-access-the-developer-options-menu-and-enable-usb-debugging-on-android-4.2/ https://www.howtogeek.com/129728/how-to-access-the-developer... you then have the option to enable "Aggressive Wi-Fi to Cellular handover" > It just artificially reduces the WiFi RSSI (received signal strength indication) to encourage the WiFi state machine to decide to switch the connection from WiFi to cellular network. https://android.stackexchange.com/questions/90250/what-does-the-aggressive-wi-fi-to-cellular-handover-option-in-developer-settin https://android.stackexchange.com/questions/90250/what-does-... Anecdotally, I have had fewer headaches with the phone holding on to poor wifi-signals since I enabled this. Ideally the phone would handle this in a smarter way, e.g., by monitoring the strength of both the wifi and data signals and switching to whichever is likely to have the least packet loss.