iOS doesn't have granular control over notifications as Android does. This is specially frustrating while being on call: how can I get only notified about pages but silence everything else?
Well, the solution is a bit simple! Enter Emergency Bypass
for contacts: a feature added in iOS 10 (I think?) that will let calls and SMS from specific contacts to always ring, even if the phone is in Do Not Disturb mode.
- From your phone, download the vCard with all the possible numbers that PagerDuty can use to contact you (even in other countries!). If the above link doesn't work, try here
- Select
Open in "Contacts"
and add the new contact. - Edit the contact, and go to
Ring Tone
. Touch it and it will display a ton of other options.