Here are some articles that may help you

International roaming – while you’re overseas

Here's some handy info for when you've touched down overseas, and are roaming with your phone.

Do Not Disturb on iPhone

The ‘Do Not Disturb’ feature on iPhone or iPad (on iOS 6+) lets you temporarily block incoming calls and silence notifications (including for messages) when you want some peace and quiet. You can schedule a start and end time, choose to still receive calls from selected contacts and there’s an option to let calls through if any contact calls twice within 3 minutes.

How can I stop all of my calls going to Voicemail

If all of your calls are going to Voicemail (your phone isn't ringing), here's how to fix it. It's probably because all of your calls are set to divert to voicemail. Voice mail message bank messages.

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