Didn’t realize that Android only has one network connection active at any given time. So if you keep your WiFi turned on all the time, and for some reason, your WiFi connection is spotty, then Android may not really fall back to 3G. For instance, my WiFi connection at a hotel during my recent trip to Hawaii, was renewed every day. And this hotel WiFi managing system would essentially redirect all HTTP requests to its own portal to ask users to login. Now note that my WiFi connection was good – Android’s network utilities showed WiFi as available as well as connected – and hence, majority of the apps on my phone remained unable to even fallback to 3G given that HTTP requests over WiFi were really failing.
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