OH has dumped iPhone 4 for Sony z3 but now 4 days later the iPhone still gets text messages and notifications from social media. How do we persuade it that it’s over?

Turn it off.

Reset it. Make sure you sign out of iCloud first.

You don’t need to sign out of icloud. Once you reset the phone it needs an icloud login to add it back into your pool of devices.

Microwave for 10 seconds?

That’ll only make it stronger.

If they are iMessages, you are stuffed. I think that, once your mobile number is associated with an iPhone, messgaes with a preference for iMessage will still go to the iPhone rather than as texts to the new phone.

Or something.

Full wipe and reset, but yes sign out of icloud first.

Yeah, she’ll need to sign out of iMessages.

How to turn off iMessage when switching from iPhone to Android

Whats the Z3 like?

Microwave for 10 seconds?

Don’t be silly. You put them in the freezer overnight to straighten them out.

This will sort it out
http://www.amazon.com/Black-Hole-Faraday-Bag-Isolation/dp/B0091WILY0

As above switch off imessage, sign out and reset. For me it took a few days before other iPhone users phones didn’t recognise the number as an imessage number. The other stuff should be instant though.