How to change the notification sound on the iPhone

If you use your iPhone often (and who doesn’t these days?), then it isn’t long before the notification sounds get boring and tedious. You’re probably keen to change the notification sounds on your iPhone, either for the whole device or for a specific app. So here’s how to do it. Instead of a beep, you can have the noise of the green slime monster from Ghostbusters for when your other half calls. Just don’t tell them.