How can I trigger my iPhone's alarm on receipt of an SMS message? I want to give certain people the ability to wake me up by sending an SMS message (e.g. "Wake Up!") to me, even when Do Not Disturb is on.  Is there a utility that makes this possible, or an app that already does something similar?
If you mark those people as "VIP's" on your phone, then their text messages will sound even when the Do Not Disturb mode is one.