Closing out of your apps is like turning your iPhone off and back on — it gives your apps a fresh start. If one of the apps that you have open crashes in the background, it may prevent other apps you have open from functioning properly. It can be difficult to identify which specific app or apps are malfunctioning, so we'll close them all to save time. Double-press the Home button to view the apps your currently have open. Use your finger to swipe up on the apps to close them. You'll know all your apps are closed when you only see a preview of your lock screen.
Tap Record a new greeting. Note: If necessary, delete an existing greeting (limit of 2 greetings) to make room for the new greeting: Tap the Menu key, tap Delete greetings, tap the check box next to the desired greeting, and then tap Delete.

Note that if your phone rings for any longer than a specified period (15 seconds in default), any re-direction feature that you have activated, such as voicemail or call forwarding, will come into effect. Transferring Calls To transfer a call to another extension, press the R button to get dial tone and put your current caller on hold.
Thank you. I have tried the phone in another socket and it does the same thing. Rings twice and cuts off, 1571 doesn't kick in. I'm a bit concerned as I had a phone call from someone saying they could stop nusaince calls. I said no but it has been since then.