A classic problem people had with their RAZR's and similar era phones was that they set up their phone to charge overnight out of reach (in the kitchen, on a desk, etc), they'd receive a text after they had gone to bed and the phone would beep every 3 minutes until they got up and acknowledged the text. This happened even if the phone was set to vibrate and there was no setting to turn off this feature. This deck proposed a series of changes and compromises to alleviate this problem:
This whiteboard session shows further thinking around managing reminders.
An overview analysis of all the possible messaging types on might encounter with the phone