How do I know if Extended is running in the Background iOS?

[Whit27]

I have the iPhone 5s and now have access to Extended. 

Have gone thru the setup and is this something that I need to keep open inorder to get calls and texts?  or can I use the phone as normal and I will be notified of incoming calls and texts as long as its running in the background?  thought there might be an icon in the status bar at the top if it was running.  But I don't see anything in regards to it.

Cheers

Whit

[Whit27]

Just did a test and when I am in airplane mode and connected to WIFI incoming phone calls don't work in Extended.  They ring 4 or 5 times and go to VM.

[Whit27]

But I am able to make outgoing calls

[Dark_Knight]

Once you've signed in, it stays running in the background for about 15 minutes and then it times out. You need to have a cellular connection to be able to receive calls though.