Ever since upgrading to iOS 8 I've had a lot of trouble with Siri in my home via WiFi (the issue started with iOS 7 but wasn't as frequent). If the iPhones are asleep, holding down the button to summon Siri results in an assistant with no pulse (flat line rather than the typical sine wave). Since I've also noticed that other apps aren't connecting to the internet, I think what's happening is that the iPhone isn't reconnecting to WiFi when the phone wakes up. (Sometimes it reconnects by itself after a while, sometimes I have to turn WiFi off and on again in Settings) Interestingly, turning off WiFi and going back to LTE solves the general internet connection, but it doesn't solve the Siri problem...it often takes a full iPhone reboot. I've tried several troubleshooting steps, including restoring the iPhone as new (but restoring settings from a backup), but nothing has borne fruit. Any suggestions about further troubleshooting with WiFi as well as Siri?