Turning this setting off does NOT turn off cellular handover altogether. If I'm wrong and this is somehow meaningful, I'm happy to admit it and explain here why. Google is probably uncertain about the consequences of this setting and the optimal way to adjust rssi. The rssi variable goes on to influence how the connection is classified: isBadRSSI, isLowRSSI, or isHighRSSI.Īs to why it's hidden under the developer options, I'd say that is because it seems a little hackish, with a seemingly arbitrary scalar (6) that some dev came up with to nudge the behavior in the desired direction. The variable mAggressiveHandover is an int that is set to 0 or 1 by the Developer Settings: private void writeWifiAggressiveHandoverOptions() Around line 3559 of WifiStateMachine.java ( line 4262 for Android 6.0.1_r10): int rssi = mWifiInfo.getRssi() - 6 * mAggressiveHandover + (homeNetworkBoost ? WifiConfiguration.HOME_NETWORK_RSSI_BOOST : 0)
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.
The code for shouldSwitchNetwork() best explains what it does.
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