Siri "Turn WiFi off"—"Turn WiFi on"

[Habakuk]

"Turn WiFi off" works with iPad Air (cellular) and iPhone 5 (both iOS 8.0.2). But "Turn WiFi on" works only with iPad Air. My iPhone 5 keeps saying… "Siri is not available. Connect to internet." …although there is a stable cellular connection. Am I doing something wrong? Did I miss some settings on iPhone? Thanks in advance for any hints.

 

[azukre]

Sounds like network issue, have you restart your iPhone 5?

 

[Habakuk]

Sounds like network issue, have you restart your iPhone 5?

That did the magic, thanks!

 

[I7guy]

My 5s did the same thing. I'm going to shutdown and report back.

Edit: same thing after reboot.