As a side-note, the way I came across the problem was that yesterday I was trying to change the location of a date and my text messages were not always getting

As a side-note, the way I came across the problem was that yesterday I was trying to change the location of a date and my text messages were not always getting through (possibly due to my proximity to the G20 cell jamming). I realized that there was no way to know for sure, by text messages, whether we both committed to the change. (fortunately it worked out anyway)