My sister has a Moto G 3G version, which is completely stock; no root, no mods, etc. When she turns it off, it plays a ringtone, instead of just a silent power down. My partner and I have the same phone, but we cannot replicate the problem, with a view to solving it. My partner and I are technically minded, but my sister is not. I don't have physical access to her phone to try different options, as we live in different parts of the UK. I can pass on information to her to test things. Can someone suggest a way to stop it ringing when it's switched off, and a reason why this may be happening, please? She doesn't want to silence the whole phone; she just wants to stop it ringing when it switches off. I would be grateful for any suggestions you can offer.